{"tests": [
  {"description": "empty",
  "input": "",
  "output": []},

  {"description": "length=1 IDENT (lowercase)",
  "input": "a",
  "output": [["IDENT", "a"]]},

  {"description": "length=1 IDENT (uppercase)",
  "input": "A",
  "output": [["IDENT", "A"]]},

  {"description": "length=2 IDENT (uppercase)",
  "input": "AB",
  "output": [["IDENT", "AB"]]},

  {"description": "length=2 IDENT (lowercase)",
  "input": "ab",
  "output": [["IDENT", "ab"]]},

  {"description": "\\",
  "input": "\\",
  "output": [["DELIM", "\\"]]},

  {"description": "IDENT started by escape 1",
  "input": "\\41",
  "output": [["IDENT", "A"]]},

  {"description": "IDENT started by escape 2",
  "input": "\\041",
  "output": [["IDENT", "A"]]},

  {"description": "IDENT started by escape 3",
  "input": "\\0041",
  "output": [["IDENT", "A"]]},

  {"description": "IDENT started by escape 4",
  "input": "\\00041",
  "output": [["IDENT", "A"]]},

  {"description": "IDENT started by escape 5",
  "input": "\\000041",
  "output": [["IDENT", "A"]]},

  {"description": "IDENT started by escape 6",
  "input": "\\0000041",
  "output": [["IDENT", "\u00041"]]},

  {"description": "IDENT started by escape 7",
  "input": "\\00000041",
  "output": [["IDENT", "\u000041"]]},

  {"description": "IDENT started by escape followed by a space 1",
  "input": "\\41 ",
  "output": [["IDENT", "A"]]},

  {"description": "IDENT started by escape followed by a space 2",
  "input": "\\41 a",
  "output": [["IDENT", "Aa"]]},

  {"description": "IDENT started by escape followed by a space 3",
  "input": "\\41\u0009a",
  "output": [["IDENT", "Aa"]]},

  {"description": "IDENT started by escape followed by a space 4",
  "input": "\\000041 ",
  "output": [["IDENT", "A"]]},

  {"description": "IDENT started by escape followed by a space 5",
  "input": "\\000041\u000D\u000A",
  "output": [["IDENT", "A"]]},

  {"description": "\\\u000D",
  "input": "\\\u000D",
  "output": [["DELIM", "\\"], ["S"]]},

  {"description": "\\\u000D\u000A",
  "input": "\\\u000D\u000A",
  "output": [["DELIM", "\\"], ["S"]]},

  {"description": "\\\u000D\\\u000A",
  "input": "\\\u000D\\\u000A",
  "output": [["DELIM", "\\"], ["S"], ["DELIM", "\\"], ["S"]]},

  {"description": "\\\u000C",
  "input": "\\\u000C",
  "output": [["DELIM", "\\"], ["S"]]},

  {"description": "\\\u000A",
  "input": "\\\u000A",
  "output": [["DELIM", "\\"], ["S"]]},

  {"description": "\\ ",
  "input": "\\ ",
  "output": [["IDENT", " "]]},

  {"description": "\\\\",
  "input": "\\\\",
  "output": [["IDENT", "\\"]]},

  {"description": "\\\\\\",
  "input": "\\\\\\",
  "output": [["IDENT", "\\"], ["DELIM", "\\"]]},

  {"description": "\\\u0009",
  "input": "\\\u0009",
  "output": [["IDENT", "\u0009"]]},

  {"description": "\\X",
  "input": "\\X",
  "output": [["IDENT", "X"]]},

  {"description": "a\\",
  "input": "a\\",
  "output": [["IDENT", "a"], ["DELIM", "\\"]]},

  {"description": "a\\f1",
  "input": "a\\f1",
  "output": [["IDENT", "a\u00f1"]]},

  {"description": "a\\F1",
  "input": "a\\F1",
  "output": [["IDENT", "a\u00f1"]]},

  {"description": "a\\0f1",
  "input": "a\\0f1",
  "output": [["IDENT", "a\u00f1"]]},

  {"description": "a\\0F1",
  "input": "a\\0F1",
  "output": [["IDENT", "a\u00f1"]]},

  {"description": "a\\41",
  "input": "a\\41",
  "output": [["IDENT", "aA"]]},

  {"description": "a\\41 b",
  "input": "a\\41 b",
  "output": [["IDENT", "aAb"]]},

  {"description": "a\\41\u0009X",
  "input": "a\\41\u0009X",
  "output": [["IDENT", "aAX"]]},

  {"description": "a\\4e00",
  "input": "a\\4e00",
  "output": [["IDENT", "a\u4e00"]]},

  {"description": "a\\41  X",
  "input": "a\\41  X",
  "output": [["IDENT", "aA"], ["S"], ["IDENT", "X"]]},

  {"description": "a\\ ",
  "input": "a\\ ",
  "output": [["IDENT", "a "]]},

  {"description": "a\\ b",
  "input": "a\\ b",
  "output": [["IDENT", "a b"]]},

  {"description": "a\\\\b",
  "input": "a\\\\b",
  "output": [["IDENT", "a\\b"]]},

  {"description": "a\\\u0009b",
  "input": "a\\\u0009b",
  "output": [["IDENT", "a\u0009b"]]},

  {"description": "a\\GB",
  "input": "a\\GB",
  "output": [["IDENT", "aGB"]]},

  {"description": "a\\\u000D",
  "input": "a\\\u000D",
  "output": [["IDENT", "a"], ["DELIM", "\\"], ["S"]]},

  {"description": "a\\\u000A",
  "input": "a\\\u000A",
  "output": [["IDENT", "a"], ["DELIM", "\\"], ["S"]]},

  {"description": "a\\\u000D\u000A",
  "input": "a\\\u000D\u000A",
  "output": [["IDENT", "a"], ["DELIM", "\\"], ["S"]]},

  {"description": "a\\\u000D\\\u000A",
  "input": "a\\\u000D\\\u000A",
  "output": [["IDENT", "a"], ["DELIM", "\\"], ["S"], ["DELIM", "\\"], ["S"]]},

  {"description": "a\\\u000C",
  "input": "a\\\u000C",
  "output": [["IDENT", "a"], ["DELIM", "\\"], ["S"]]},

  {"description": "\\-",
  "input": "\\-",
  "output": [["IDENT", "-"]]},

  {"description": "-i",
  "input": "-i",
  "output": [["IDENT", "-i"]]},

  {"description": "\\-i",
  "input": "\\-i",
  "output": [["IDENT", "-i"]]},

  {"description": "-ident",
  "input": "-ident",
  "output": [["IDENT", "-ident"]]},

  {"description": "\\-ident",
  "input": "\\-ident",
  "output": [["IDENT", "-ident"]]},

  {"description": "-ident-ident",
  "input": "-ident-ident",
  "output": [["IDENT", "-ident-ident"]]},

  {"description": "\\-ident-ident",
  "input": "\\-ident-ident",
  "output": [["IDENT", "-ident-ident"]]},

  {"description": "-1",
  "input": "-1",
  "output": [["MINUS"], ["NUMBER", "1"]]},

  {"description": "\\-1",
  "input": "\\-1",
  "output": [["IDENT", "-1"]]},

  {"description": "-1a",
  "input": "-1a",
  "output": [["MINUS"], ["DIMENSION", "1", "a"]]},

  {"description": "\\-1a",
  "input": "\\-1a",
  "output": [["IDENT", "-1a"]]},

  {"description": "-\\31",
  "input": "-\\31",
  "output": [["IDENT", "-1"]]},

  {"description": "\\-\\31",
  "input": "\\-\\31",
  "output": [["IDENT", "-1"]]},

  {"description": "-\\41",
  "input": "-\\41",
  "output": [["IDENT", "-A"]]},

  {"description": "\\-\\41",
  "input": "\\-\\41",
  "output": [["IDENT", "-A"]]},

  {"description": "-\\\u000D",
  "input": "-\\\u000D",
  "output": [["MINUS"], ["DELIM", "\\"], ["S"]]},

  {"description": "\\-\\\u000D",
  "input": "\\-\\\u000D",
  "output": [["IDENT", "-"], ["DELIM", "\\"], ["S"]]},

  {"description": "\u4e00",
  "input": "\u4e00",
  "output": [["IDENT", "\u4e00"]]},

  {"description": "a\u4e00b",
  "input": "a\u4e00b",
  "output": [["IDENT", "a\u4e00b"]]},

  {"description": "@",
  "input": "@",
  "output": [["DELIM", "@"]]},

  {"description": "@a",
  "input": "@a",
  "output": [["ATKEYWORD", "a"]]},

  {"description": "@A",
  "input": "@A",
  "output": [["ATKEYWORD", "A"]]},

  {"description": "@abc",
  "input": "@abc",
  "output": [["ATKEYWORD", "abc"]]},

  {"description": "@-",
  "input": "@-",
  "output": [["DELIM", "@"], ["MINUS"]]},

  {"description": "@\\-",
  "input": "@\\-",
  "output": [["ATKEYWORD", "-"]]},

  {"description": "@-a",
  "input": "@-a",
  "output": [["ATKEYWORD", "-a"]]},

  {"description": "@\\-a",
  "input": "@\\-a",
  "output": [["ATKEYWORD", "-a"]]},

  {"description": "@1",
  "input": "@1",
  "output": [["DELIM", "@"], ["NUMBER", "1"]]},

  {"description": "@\\1",
  "input": "@\\1",
  "output": [["ATKEYWORD", "\u0001"]]},

  {"description": "@-1",
  "input": "@-1",
  "output": [["DELIM", "@"], ["MINUS"], ["NUMBER", "1"]]},

  {"description": "@--",
  "input": "@--",
  "output": [["DELIM", "@"], ["MINUS"], ["MINUS"]]},

  {"description": "@--1",
  "input": "@--1",
  "output": [["DELIM", "@"], ["MINUS"], ["MINUS"], ["NUMBER", "1"]]},

  {"description": "@--a",
  "input": "@--a",
  "output": [["DELIM", "@"], ["MINUS"], ["IDENT", "-a"]]},

  {"description": "@-\\-a",
  "input": "@-\\-a",
  "output": [["ATKEYWORD", "--a"]]},

  {"description": "@-->",
  "input": "@-->",
  "output": [["DELIM", "@"], ["CDC"]]},

  {"description": "@--->",
  "input": "@--->",
  "output": [["DELIM", "@"], ["MINUS"], ["CDC"]]},

  {"description": "@\\41",
  "input": "@\\41",
  "output": [["ATKEYWORD", "A"]]},

  {"description": "@\\61 b",
  "input": "@\\61 b",
  "output": [["ATKEYWORD", "ab"]]},

  {"description": "@\\61  b",
  "input": "@\\61  b",
  "output": [["ATKEYWORD", "a"], ["S"], ["IDENT", "b"]]},

  {"description": "@a\\41",
  "input": "@aA",
  "output": [["ATKEYWORD", "aA"]]},

  {"description": "@a\\4e00X",
  "input": "@a\\4e00X",
  "output": [["ATKEYWORD", "a\u4e00X"]]},

  {"description": "\"",
  "input": "\"",
  "output": [["INVALID", ""]]},

  {"description": "'",
  "input": "'",
  "output": [["INVALID", ""]]},

  {"description": "\"\"",
  "input": "\"\"",
  "output": [["STRING", ""]]},

  {"description": "''",
  "input": "''",
  "output": [["STRING", ""]]},

  {"description": "\"a",
  "input": "\"a",
  "output": [["INVALID", "a"]]},

  {"description": "'a",
  "input": "'a",
  "output": [["INVALID", "a"]]},

  {"description": "'a'",
  "input": "'a'",
  "output": [["STRING", "a"]]},

  {"description": "\"a\"",
  "input": "\"a\"",
  "output": [["STRING", "a"]]},

  {"description": "'a'",
  "input": "'a'",
  "output": [["STRING", "a"]]},

  {"description": "\"a'",
  "input": "\"a'",
  "output": [["INVALID", "a'"]]},

  {"description": "'a\"",
  "input": "'a\"",
  "output": [["INVALID", "a\""]]},

  {"description": "\"A",
  "input": "\"A",
  "output": [["INVALID", "A"]]},

  {"description": "'A",
  "input": "'A",
  "output": [["INVALID", "A"]]},

  {"description": "\"A\"",
  "input": "\"A\"",
  "output": [["STRING", "A"]]},

  {"description": "'A'",
  "input": "'A'",
  "output": [["STRING", "A"]]},

  {"description": "\"A'",
  "input": "\"A'",
  "output": [["INVALID", "A'"]]},

  {"description": "'A\"",
  "input": "'A\"",
  "output": [["INVALID", "A\""]]},

  {"description": "\"abc",
  "input": "\"abc",
  "output": [["INVALID", "abc"]]},

  {"description": "'abc",
  "input": "'abc",
  "output": [["INVALID", "abc"]]},

  {"description": "\"abc\"",
  "input": "\"abc\"",
  "output": [["STRING", "abc"]]},

  {"description": "'abc'",
  "input": "'abc'",
  "output": [["STRING", "abc"]]},

  {"description": "\"a\\",
  "input": "\"a\\",
  "output": [["INVALID", "a"], ["DELIM", "\\"]]},

  {"description": "'a\\",
  "input": "'a\\",
  "output": [["INVALID", "a"], ["DELIM", "\\"]]},

  {"description": "\"\\",
  "input": "\"\\",
  "output": [["INVALID", ""], ["DELIM", "\\"]]},

  {"description": "'\\",
  "input": "'\\",
  "output": [["INVALID", ""], ["DELIM", "\\"]]},

  {"description": "\"a\\\"",
  "input": "\"a\\\"",
  "output": [["INVALID", "a\""]]},

  {"description": "'a\\\"",
  "input": "'a\\\"",
  "output": [["INVALID", "a\""]]},

  {"description": "'a\\'",
  "input": "'a\\'",
  "output": [["INVALID", "a'"]]},

  {"description": "\"\\\"",
  "input": "\"\\\"",
  "output": [["INVALID", "\""]]},

  {"description": "'\\\"",
  "input": "'\\\"",
  "output": [["INVALID", "\""]]},

  {"description": "'\\'",
  "input": "'\\'",
  "output": [["INVALID", "'"]]},

  {"description": "'\\\\\"",
  "input": "'\\\\\"",
  "output": [["INVALID", "\\\""]]},

  {"description": "\"a\\'",
  "input": "\"a\\'",
  "output": [["INVALID", "a'"]]},

  {"description": "\"a\\x",
  "input": "\"a\\x",
  "output": [["INVALID", "ax"]]},

  {"description": "\"\\x",
  "input": "\"\\x",
  "output": [["INVALID", "x"]]},

  {"description": "'\\x",
  "input": "'\\x",
  "output": [["INVALID", "x"]]},

  {"description": "\"a\\x\"",
  "input": "\"a\\x\"",
  "output": [["STRING", "ax"]]},

  {"description": "\"\\x \"",
  "input": "\"\\x \"",
  "output": [["STRING", "x "]]},

  {"description": "\"a\\x \"",
  "input": "\"a\\x \"",
  "output": [["STRING", "ax "]]},

  {"description": "\"\\31",
  "input": "\"\\31",
  "output": [["INVALID", "1"]]},

  {"description": "\"a\\31",
  "input": "\"a\\31",
  "output": [["INVALID", "a1"]]},

  {"description": "'a\\31",
  "input": "'a\\31",
  "output": [["INVALID", "a1"]]},

  {"description": "\"\\31\"",
  "input": "\"\\31\"",
  "output": [["STRING", "1"]]},

  {"description": "'\\31'",
  "input": "'\\31'",
  "output": [["STRING", "1"]]},

  {"description": "\"a\\31\"",
  "input": "\"a\\31\"",
  "output": [["STRING", "a1"]]},

  {"description": "\"\\31 ",
  "input": "\"\\31 ",
  "output": [["INVALID", "1"]]},

  {"description": "\"a\\31 ",
  "input": "\"a\\31 ",
  "output": [["INVALID", "a1"]]},

  {"description": "\"a\\31 \"",
  "input": "\"a\\31 \"",
  "output": [["STRING", "a1"]]},

  {"description": "\"\\\u000D",
  "input": "\"\\\u000D",
  "output": [["INVALID", ""]]},

  {"description": "url(\"\\\u000D)",
  "input": "url(\"\\\u000D)",
  "output": [["URI_INVALID"]]},

  {"description": "'\\\u000D",
  "input": "'\\\u000D",
  "output": [["INVALID", ""]]},

  {"description": "url('\\\u000D)",
  "input": "url('\\\u000D)",
  "output": [["URI_INVALID"]]},

  {"description": "\"a\\\u000D",
  "input": "\"a\\\u000D",
  "output": [["INVALID", "a"]]},

  {"description": "\"a\\\u000D\"",
  "input": "\"a\\\u000D\"",
  "output": [["STRING", "a"]]},

  {"description": "url(\"a\\\u000D\")",
  "input": "url(\"a\\\u000D\")",
  "output": [["URI", "a"]]},

  {"description": "'a\\\u000D'",
  "input": "'a\\\u000D'",
  "output": [["STRING", "a"]]},

  {"description": "url('a\\\u000D')",
  "input": "url('a\\\u000D')",
  "output": [["URI", "a"]]},

  {"description": "\"a\\\u000D\u000A",
  "input": "\"a\\\u000D\u000A",
  "output": [["INVALID", "a"]]},

  {"description": "\"a\\\u000D\u000A\"",
  "input": "\"a\\\u000D\u000A\"",
  "output": [["STRING", "a"]]},

  {"description": "\"a\\\u000D\\\u000A",
  "input": "\"a\\\u000D\\\u000A",
  "output": [["INVALID", "a"]]},

  {"description": "'a\\\u000D\\\u000A",
  "input": "'a\\\u000D\\\u000A",
  "output": [["INVALID", "a"]]},

  {"description": "\"a\\\u000D\\\u000A\"",
  "input": "\"a\\\u000D\\\u000A\"",
  "output": [["STRING", "a"]]},

  {"description": "\"a\\\u000A",
  "input": "\"a\\\u000A",
  "output": [["INVALID", "a"]]},

  {"description": "\"a\\\u000A\"",
  "input": "\"a\\\u000A\"",
  "output": [["STRING", "a"]]},

  {"description": "'a\\\u000A'",
  "input": "'a\\\u000A'",
  "output": [["STRING", "a"]]},

  {"description": "\"a\\\u000C",
  "input": "\"a\\\u000C",
  "output": [["INVALID", "a"]]},

  {"description": "\"a\\\u000C\"",
  "input": "\"a\\\u000C\"",
  "output": [["STRING", "a"]]},

  {"description": "'a\\\u000C'",
  "input": "'a\\\u000C'",
  "output": [["STRING", "a"]]},

  {"description": "\"a\\\u000Daa",
  "input": "\"a\\\u000Daa",
  "output": [["INVALID", "aaa"]]},

  {"description": "\"a\\\u000D\u000Ab",
  "input": "\"a\\\u000D\u000Ab",
  "output": [["INVALID", "ab"]]},

  {"description": "'a\\\u000D\u000Ab",
  "input": "'a\\\u000D\u000Ab",
  "output": [["INVALID", "ab"]]},

  {"description": "'\u000d'",
  "input": "'\u000d'",
  "output": [["INVALID", ""], ["S"], ["INVALID", ""]]},

  {"description": "\"\u000d\"",
  "input": "\"\u000d\"",
  "output": [["INVALID", ""], ["S"], ["INVALID", ""]]},

  {"description": "'\u000d\u000a'",
  "input": "'\u000d\u000a'",
  "output": [["INVALID", ""], ["S"], ["INVALID", ""]]},

  {"description": "\"\u000d\u000a\"",
  "input": "\"\u000d\u000a\"",
  "output": [["INVALID", ""], ["S"], ["INVALID", ""]]},

  {"description": "'\u000a'",
  "input": "'\u000a'",
  "output": [["INVALID", ""], ["S"], ["INVALID", ""]]},

  {"description": "\"\u000a\"",
  "input": "\"\u000a\"",
  "output": [["INVALID", ""], ["S"], ["INVALID", ""]]},

  {"description": "'\u000c'",
  "input": "'\u000c'",
  "output": [["INVALID", ""], ["S"], ["INVALID", ""]]},

  {"description": "\"\u000c\"",
  "input": "\"\u000c\"",
  "output": [["INVALID", ""], ["S"], ["INVALID", ""]]},

  {"description": "#",
  "input": "#",
  "output": [["DELIM", "#"]]},

  {"description": "\\#",
  "input": "\\#",
  "output": [["IDENT", "#"]]},

  {"description": "#a",
  "input": "#a",
  "output": [["HASH", "a"]]},

  {"description": "#A",
  "input": "#A",
  "output": [["HASH", "A"]]},

  {"description": "##",
  "input": "##",
  "output": [["DELIM", "#"], ["DELIM", "#"]]},

  {"description": "#\\#",
  "input": "#\\#",
  "output": [["HASH", "#"]]},

  {"description": "#\\X",
  "input": "#\\X",
  "output": [["HASH", "X"]]},

  {"description": "#\\a",
  "input": "#\\a",
  "output": [["HASH", "\u000a"]]},

  {"description": "#\\-",
  "input": "#\\-",
  "output": [["HASH", "-"]]},

  {"description": "#_",
  "input": "#_",
  "output": [["HASH", "_"]]},

  {"description": "#0",
  "input": "#0",
  "output": [["HASH", "0"]]},

  {"description": "#123456",
  "input": "#123456",
  "output": [["HASH", "123456"]]},

  {"description": "#abc",
  "input": "#abc",
  "output": [["HASH", "abc"]]},

  {"description": "#\\4e00XYZ",
  "input": "#\\4e00XYZ",
  "output": [["HASH", "\u4e00XYZ"]]},

  {"description": "#\u4e00",
  "input": "#\u4e00",
  "output": [["HASH", "\u4e00"]]},

  {"description": "#a\\100",
  "input": "#a\\100",
  "output": [["HASH", "a\u0100"]]},

  {"description": "#1234567890",
  "input": "#1234567890",
  "output": [["HASH", "1234567890"]]},

  {"description": "#1a",
  "input": "#1a",
  "output": [["HASH", "1a"]]},

  {"description": "#\\a b",
  "input": "#\\a b",
  "output": [["HASH", "\u000ab"]]},

  {"description": "#!",
  "input": "#!",
  "output": [["DELIM", "#"], ["EXCLAMATION"]]},

  {"description": "#-",
  "input": "#-",
  "output": [["HASH", "-"]]},

  {"description": "#--",
  "input": "#--",
  "output": [["HASH", "--"]]},

  {"description": "#-->",
  "input": "#-->",
  "output": [["HASH", "--"], ["GREATER"]]},

  {"description": "0",
  "input": "0",
  "output": [["NUMBER", "0"]]},

  {"description": "1",
  "input": "1",
  "output": [["NUMBER", "1"]]},

  {"description": "111",
  "input": "111",
  "output": [["NUMBER", "111"]]},

  {"description": "0001",
  "input": "0001",
  "output": [["NUMBER", "0001"]]},

  {"description": "1e",
  "input": "1e",
  "output": [["DIMENSION", "1", "e"]]},

  {"description": "1e4",
  "input": "1e4",
  "output": [["DIMENSION", "1", "e4"]]},

  {"description": "1n+2",
  "input": "1n+2",
  "output": [["DIMENSION", "1", "n"], ["PLUS"], ["NUMBER", "2"]]},

  {"description": "0.",
  "input": "0.",
  "output": [["NUMBER", "0"], ["DOT"]]},

  {"description": "1.",
  "input": "1.",
  "output": [["NUMBER", "1"], ["DOT"]]},

  {"description": "144.",
  "input": "144.",
  "output": [["NUMBER", "144"], ["DOT"]]},

  {"description": "0.1",
  "input": "0.1",
  "output": [["NUMBER", "0.1"]]},

  {"description": "1.1",
  "input": "1.1",
  "output": [["NUMBER", "1.1"]]},

  {"description": "0.1000",
  "input": "0.1000",
  "output": [["NUMBER", "0.1000"]]},

  {"description": "0.0001",
  "input": "0.0001",
  "output": [["NUMBER", "0.0001"]]},

  {"description": ".",
  "input": ".",
  "output": [["DOT"]]},

  {"description": ".1",
  "input": ".1",
  "output": [["NUMBER", "0.1"]]},

  {"description": ".0",
  "input": ".0",
  "output": [["NUMBER", "0.0"]]},

  {"description": ".1234",
  "input": ".1234",
  "output": [["NUMBER", "0.1234"]]},

  {"description": ".1ab",
  "input": ".1ab",
  "output": [["DIMENSION", "0.1", "ab"]]},

  {"description": ".1.2",
  "input": ".1.2",
  "output": [["NUMBER", "0.1"], ["NUMBER", "0.2"]]},

  {"description": ".a",
  "input": ".a",
  "output": [["DOT"], ["IDENT", "a"]]},

  {"description": "3.11.66",
  "input": "3.11.66",
  "output": [["NUMBER", "3.11"], ["NUMBER", "0.66"]]},

  {"description": "..",
  "input": "..",
  "output": [["DOT"], ["DOT"]]},

  {"description": "...",
  "input": "...",
  "output": [["DOT"], ["DOT"], ["DOT"]]},

  {"description": "...1",
  "input": "...1",
  "output": [["DOT"], ["DOT"], ["NUMBER", "0.1"]]},

  {"description": "...a",
  "input": "...a",
  "output": [["DOT"], ["DOT"], ["DOT"], ["IDENT", "a"]]},

  {"description": "+0",
  "input": "+0",
  "output": [["PLUS"], ["NUMBER", "0"]]},

  {"description": "+1",
  "input": "+1",
  "output": [["PLUS"], ["NUMBER", "1"]]},

  {"description": "+1.15",
  "input": "+1.15",
  "output": [["PLUS"], ["NUMBER", "1.15"]]},

  {"description": "-.55",
  "input": "-.55",
  "output": [["MINUS"], ["NUMBER", "0.55"]]},

  {"description": "-0",
  "input": "-0",
  "output": [["MINUS"], ["NUMBER", "0"]]},

  {"description": "-0.2",
  "input": "-0.2",
  "output": [["MINUS"], ["NUMBER", "0.2"]]},

  {"description": "-.1",
  "input": "-.1",
  "output": [["MINUS"], ["NUMBER", "0.1"]]},

  {"description": "+-0",
  "input": "+-0",
  "output": [["PLUS"], ["MINUS"], ["NUMBER", "0"]]},

  {"description": "a-0",
  "input": "a-0",
  "output": [["IDENT", "a-0"]]},

  {"description": "@a-0",
  "input": "@a-0",
  "output": [["ATKEYWORD", "a-0"]]},

  {"description": "#a-0",
  "input": "#a-0",
  "output": [["HASH", "a-0"]]},

  {"description": "<!-0",
  "input": "<!-0",
  "output": [["DELIM", "<"], ["EXCLAMATION"], ["MINUS"], ["NUMBER", "0"]]},

  {"description": "<!--0",
  "input": "<!--0",
  "output": [["CDO"], ["NUMBER", "0"]]},

  {"description": "<!---0",
  "input": "<!---0",
  "output": [["CDO"], ["MINUS"], ["NUMBER", "0"]]},

  {"description": "0a",
  "input": "0a",
  "output": [["DIMENSION", "0", "a"]]},

  {"description": "1a",
  "input": "1a",
  "output": [["DIMENSION", "1", "a"]]},

  {"description": "0A",
  "input": "0A",
  "output": [["DIMENSION", "0", "A"]]},

  {"description": "00a",
  "input": "00a",
  "output": [["DIMENSION", "00", "a"]]},

  {"description": "11a",
  "input": "11a",
  "output": [["DIMENSION", "11", "a"]]},

  {"description": "0ab",
  "input": "0ab",
  "output": [["DIMENSION", "0", "ab"]]},

  {"description": "0aB",
  "input": "0aB",
  "output": [["DIMENSION", "0", "aB"]]},

  {"description": "0.1a",
  "input": "0.1a",
  "output": [["DIMENSION", "0.1", "a"]]},

  {"description": "0.a",
  "input": "0.a",
  "output": [["NUMBER", "0"], ["DOT"], ["IDENT", "a"]]},

  {"description": ".0a",
  "input": ".0a",
  "output": [["DIMENSION", "0.0", "a"]]},

  {"description": "0\\X",
  "input": "0\\X",
  "output": [["DIMENSION", "0", "X"]]},

  {"description": "0\\Xa",
  "input": "0\\Xa",
  "output": [["DIMENSION", "0", "Xa"]]},

  {"description": "0\\.1",
  "input": "0\\.1",
  "output": [["DIMENSION", "0", ".1"]]},

  {"description": "0.\\1",
  "input": "0.\\1",
  "output": [["NUMBER", "0"], ["DOT"], ["IDENT", "\u0001"]]},

  {"description": "0a\\X",
  "input": "0a\\X",
  "output": [["DIMENSION", "0", "aX"]]},

  {"description": "0a\\Xa",
  "input": "0a\\Xa",
  "output": [["DIMENSION", "0", "aXa"]]},

  {"description": "0\\a",
  "input": "0\\a",
  "output": [["DIMENSION", "0", "\u000a"]]},

  {"description": "0\\4e00",
  "input": "0\\4e00",
  "output": [["DIMENSION", "0", "\u4e00"]]},

  {"description": "0a\\a",
  "input": "0a\\a",
  "output": [["DIMENSION", "0", "a\u000a"]]},

  {"description": "0a\\100 b",
  "input": "0a\\100 b",
  "output": [["DIMENSION", "0", "a\u0100b"]]},

  {"description": "0\\\u000d",
  "input": "0\\\u000d",
  "output": [["NUMBER", "0"], ["DELIM", "\\"], ["S"]]},

  {"description": "0\\\u000a",
  "input": "0\\\u000a",
  "output": [["NUMBER", "0"], ["DELIM", "\\"], ["S"]]},

  {"description": "0\\\u000d\u000a",
  "input": "0\\\u000d\u000a",
  "output": [["NUMBER", "0"], ["DELIM", "\\"], ["S"]]},

  {"description": "0\\\u000c",
  "input": "0\\\u000c",
  "output": [["NUMBER", "0"], ["DELIM", "\\"], ["S"]]},

  {"description": "0a\\\u000d",
  "input": "0a\\\u000d",
  "output": [["DIMENSION", "0", "a"], ["DELIM", "\\"], ["S"]]},

  {"description": "0a\\\u000a",
  "input": "0a\\\u000a",
  "output": [["DIMENSION", "0", "a"], ["DELIM", "\\"], ["S"]]},

  {"description": "0a\\\u000d\u000a",
  "input": "0a\\\u000d\u000a",
  "output": [["DIMENSION", "0", "a"], ["DELIM", "\\"], ["S"]]},

  {"description": "0a\\\u000c",
  "input": "0a\\\u000c",
  "output": [["DIMENSION", "0", "a"], ["DELIM", "\\"], ["S"]]},

  {"description": "0a12",
  "input": "0a12",
  "output": [["DIMENSION", "0", "a12"]]},

  {"description": "0a_b-c",
  "input": "0a_b-c",
  "output": [["DIMENSION", "0", "a_b-c"]]},

  {"description": "0a---",
  "input": "0a---",
  "output": [["DIMENSION", "0", "a---"]]},

  {"description": "0a-->",
  "input": "0a-->",
  "output": [["DIMENSION", "0", "a--"], ["GREATER"]]},

  {"description": "0a/**/-->",
  "input": "0a/**/-->",
  "output": [["DIMENSION", "0", "a"], ["CDC"]]},

  {"description": "0/**/a",
  "input": "0/**/a",
  "output": [["NUMBER", "0"], ["IDENT", "a"]]},

  {"description": "0-",
  "input": "0-",
  "output": [["NUMBER", "0"], ["MINUS"]]},

  {"description": "0.0-",
  "input": "0.0-",
  "output": [["NUMBER", "0.0"], ["MINUS"]]},

  {"description": "0\\-",
  "input": "0\\-",
  "output": [["DIMENSION", "0", "-"]]},

  {"description": "0-a",
  "input": "0-a",
  "output": [["DIMENSION", "0", "-a"]]},

  {"description": "0.0-a",
  "input": "0.0-a",
  "output": [["DIMENSION", "0.0", "-a"]]},

  {"description": "0-abc",
  "input": "0-abc",
  "output": [["DIMENSION", "0", "-abc"]]},

  {"description": "0-\\",
  "input": "0-\\",
  "output": [["NUMBER", "0"], ["MINUS"], ["DELIM", "\\"]]},

  {"description": "0-\\9",
  "input": "0-\\9",
  "output": [["DIMENSION", "0", "-\u0009"]]},

  {"description": "0-\\9x",
  "input": "0-\\9x",
  "output": [["DIMENSION", "0", "-\u0009x"]]},

  {"description": "0-\\9 b",
  "input": "0-\\9 b",
  "output": [["DIMENSION", "0", "-\u0009b"]]},

  {"description": "0-a\\9",
  "input": "0-a\\9",
  "output": [["DIMENSION", "0", "-a\u0009"]]},

  {"description": "0-a\\9 b",
  "input": "0-a\\9 b",
  "output": [["DIMENSION", "0", "-a\u0009b"]]},

  {"description": "0-\\x",
  "input": "0-\\x",
  "output": [["DIMENSION", "0", "-x"]]},

  {"description": "0-\\\u000d",
  "input": "0-\\\u000d",
  "output": [["NUMBER", "0"], ["MINUS"], ["DELIM", "\\"], ["S"]]},

  {"description": "0-\\\u000d\u000a",
  "input": "0-\\\u000d\u000a",
  "output": [["NUMBER", "0"], ["MINUS"], ["DELIM", "\\"], ["S"]]},

  {"description": "0-\\\u000a",
  "input": "0-\\\u000a",
  "output": [["NUMBER", "0"], ["MINUS"], ["DELIM", "\\"], ["S"]]},

  {"description": "0-\\\u000c",
  "input": "0-\\\u000c",
  "output": [["NUMBER", "0"], ["MINUS"], ["DELIM", "\\"], ["S"]]},

  {"description": "0--",
  "input": "0--",
  "output": [["NUMBER", "0"], ["MINUS"], ["MINUS"]]},

  {"description": "0-->",
  "input": "0-->",
  "output": [["NUMBER", "0"], ["CDC"]]},

  {"description": "0-a--",
  "input": "0-a--",
  "output": [["DIMENSION", "0", "-a--"]]},

  {"description": "0-a-->",
  "input": "0-a-->",
  "output": [["DIMENSION", "0", "-a--"], ["GREATER"]]},

  {"description": "0%",
  "input": "0%",
  "output": [["PERCENTAGE", "0"]]},

  {"description": "0\\%",
  "input": "0\\%",
  "output": [["DIMENSION", "0", "%"]]},

  {"description": "0.0%",
  "input": "0.0%",
  "output": [["PERCENTAGE", "0.0"]]},

  {"description": "0.0\\%",
  "input": "0.0\\%",
  "output": [["DIMENSION", "0.0", "%"]]},

  {"description": ".0%",
  "input": ".0%",
  "output": [["PERCENTAGE", "0.0"]]},

  {"description": ".0\\%",
  "input": ".0\\%",
  "output": [["DIMENSION", "0.0", "%"]]},

  {"description": "0%a",
  "input": "0%a",
  "output": [["PERCENTAGE", "0"], ["IDENT", "a"]]},

  {"description": "0\\%a",
  "input": "0\\%a",
  "output": [["DIMENSION", "0", "%a"]]},

  {"description": "120%",
  "input": "120%",
  "output": [["PERCENTAGE", "120"]]},

  {"description": "120\\%",
  "input": "120\\%",
  "output": [["DIMENSION", "120", "%"]]},

  {"description": "0.%",
  "input": "0.%",
  "output": [["NUMBER", "0"], ["DOT"], ["DELIM", "%"]]},

  {"description": "0.\\%",
  "input": "0.\\%",
  "output": [["NUMBER", "0"], ["DOT"], ["IDENT", "%"]]},

  {"description": "u",
  "input": "u",
  "output": [["IDENT", "u"]]},

  {"description": "U",
  "input": "U",
  "output": [["IDENT", "U"]]},

  {"description": "\\u",
  "input": "\\u",
  "output": [["IDENT", "u"]]},

  {"description": "ur",
  "input": "ur",
  "output": [["IDENT", "ur"]]},

  {"description": "url",
  "input": "url",
  "output": [["IDENT", "url"]]},

  {"description": "url(",
  "input": "url(",
  "output": [["URI_INVALID"]]},

  {"description": "uRl(",
  "input": "uRl(",
  "output": [["URI_INVALID"]]},

  {"description": "ur\\l(",
  "input": "ur\\l(",
  "output": [["URI_INVALID"]]},

  {"description": "url\\(",
  "input": "url\\(",
  "output": [["IDENT", "url("]]},

  {"description": "url()",
  "input": "url()",
  "output": [["URI", ""]]},

  {"description": "url( )",
  "input": "url( )",
  "output": [["URI", ""]]},

  {"description": "url(  )",
  "input": "url(  )",
  "output": [["URI", ""]]},

  {"description": "url(\u0009)",
  "input": "url(\u0009)",
  "output": [["URI", ""]]},

  {"description": "url(a)",
  "input": "url(a)",
  "output": [["URI", "a"]]},

  {"description": "url(abcde)",
  "input": "url(abcde)",
  "output": [["URI", "abcde"]]},

  {"description": "url( a)",
  "input": "url( a)",
  "output": [["URI", "a"]]},

  {"description": "url(a )",
  "input": "url(a )",
  "output": [["URI", "a"]]},

  {"description": "url( a )",
  "input": "url( a )",
  "output": [["URI", "a"]]},

  {"description": "url( /**/a)",
  "input": "url( /**/a)",
  "output": [["URI", "/**/a"]]},

  {"description": "url( /**/ a)",
  "input": "url( /**/ a)",
  "output": [["URI_INVALID"]]},

  {"description": "url(a b)",
  "input": "url(a b)",
  "output": [["URI_INVALID"]]},

  {"description": "url())",
  "input": "url())",
  "output": [["URI", ""], ["RPAREN"]]},

  {"description": "url(()",
  "input": "url(()",
  "output": [["URI_INVALID"]]},

  {"description": "url(\u0001)",
  "input": "url(\u0001)",
  "output": [["URI_INVALID"]]},

  {"description": "url(\u4e00)",
  "input": "url(\u4e00)",
  "output": [["URI", "\u4e00"]]},

  {"description": "url(\u000d)",
  "input": "url(\u000d)",
  "output": [["URI", ""]]},

  {"description": "url(\u000a)",
  "input": "url(\u000a)",
  "output": [["URI", ""]]},

  {"description": "url(\u000d\u000a)",
  "input": "url(\u000d\u000a)",
  "output": [["URI", ""]]},

  {"description": "url(\u000c)",
  "input": "url(\u000c)",
  "output": [["URI", ""]]},

  {"description": "url(\u000b)",
  "input": "url(\u000b)",
  "output": [["URI_INVALID"]]},

  {"description": "url(ad)",
  "input": "url(ad)",
  "output": [["URI", "ad"]]},

  {"description": "url(a )",
  "input": "url(a )",
  "output": [["URI", "a"]]},

  {"description": "url(a\u000d)",
  "input": "url(a\u000d)",
  "output": [["URI", "a"]]},

  {"description": "url(a\u000a)",
  "input": "url(a\u000a)",
  "output": [["URI", "a"]]},

  {"description": "url(a()",
  "input": "url(a()",
  "output": [["URI_INVALID"]]},

  {"description": "url(a))",
  "input": "url(a))",
  "output": [["URI", "a"], ["RPAREN"]]},

  {"description": "url(a\u4e00)",
  "input": "url(a\u4e00)",
  "output": [["URI", "a\u4e00"]]},

  {"description": "url(\\)",
  "input": "url(\\)",
  "output": [["URI_INVALID"]]},

  {"description": "url(a\\)",
  "input": "url(a\\)",
  "output": [["URI_INVALID"]]},

  {"description": "url(\\x)",
  "input": "url(\\x)",
  "output": [["URI", "x"]]},

  {"description": "url(a\\x)",
  "input": "url(a\\x)",
  "output": [["URI", "ax"]]},

  {"description": "url(\\xyz)",
  "input": "url(\\xyz)",
  "output": [["URI", "xyz"]]},

  {"description": "url(a\\xyz)",
  "input": "url(a\\xyz)",
  "output": [["URI", "axyz"]]},

  {"description": "url(\\x yz)",
  "input": "url(\\x yz)",
  "output": [["URI_INVALID"]]},

  {"description": "url(a\\x yz)",
  "input": "url(a\\x yz)",
  "output": [["URI_INVALID"]]},

  {"description": "url(\\a)",
  "input": "url(\\a)",
  "output": [["URI", "\u000a"]]},

  {"description": "url(\\a )",
  "input": "url(\\a )",
  "output": [["URI", "\u000a"]]},

  {"description": "url(a\\a )",
  "input": "url(a\\a )",
  "output": [["URI", "a\u000a"]]},

  {"description": "url(\\a b)",
  "input": "url(\\a b)",
  "output": [["URI", "\u000ab"]]},

  {"description": "url(\\a  b)",
  "input": "url(\\a  b)",
  "output": [["URI_INVALID"]]},

  {"description": "url(a\\a  b)",
  "input": "url(a\\a  b)",
  "output": [["URI_INVALID"]]},

  {"description": "url(\\\u000d)",
  "input": "url(\\\u000d)",
  "output": [["URI_INVALID"]]},

  {"description": "url(a\\\u000d)",
  "input": "url(a\\\u000d)",
  "output": [["URI_INVALID"]]},

  {"description": "url(\\\u000a)",
  "input": "url(\\\u000a)",
  "output": [["URI_INVALID"]]},

  {"description": "url(a\\\u000a)",
  "input": "url(a\\\u000a)",
  "output": [["URI_INVALID"]]},

  {"description": "url(\\\u000d\u000a)",
  "input": "url(\\\u000d\u000a)",
  "output": [["URI_INVALID"]]},

  {"description": "url(a\\\u000d\u000a)",
  "input": "url(a\\\u000d\u000a)",
  "output": [["URI_INVALID"]]},

  {"description": "url(\\\u000c)",
  "input": "url(\\\u000c)",
  "output": [["URI_INVALID"]]},

  {"description": "url(a\\\u000c)",
  "input": "url(a\\\u000c)",
  "output": [["URI_INVALID"]]},

  {"description": "url(\\\u0001)",
  "input": "url(\\\u0001)",
  "output": [["URI", "\u0001"]]},

  {"description": "url(a\\\u0001)",
  "input": "url(a\\\u0001)",
  "output": [["URI", "a\u0001"]]},

  {"description": "url(\\4e00)",
  "input": "url(\\4e00)",
  "output": [["URI", "\u4e00"]]},

  {"description": "url(a\\4e00)",
  "input": "url(a\\4e00)",
  "output": [["URI", "a\u4e00"]]},

  {"description": "url(\\\u0028)",
  "input": "url(\\\u0028)",
  "output": [["URI", "("]]},

  {"description": "url(a\\\u0028)",
  "input": "url(a\\\u0028)",
  "output": [["URI", "a("]]},

  {"description": "url(\\\u0029)",
  "input": "url(\\\u0029)",
  "output": [["URI", ")"]]},

  {"description": "url(a\\\u0029)",
  "input": "url(a\\\u0029)",
  "output": [["URI", "a)"]]},

  {"description": "url(a\\(b\\)c)",
  "input": "url(a\\(b\\)c)",
  "output": [["URI", "a(b)c"]]},

  {"description": "url(\\\\)",
  "input": "url(\\\\)",
  "output": [["URI", "\\"]]},

  {"description": "url(a\\\\)",
  "input": "url(a\\\\)",
  "output": [["URI", "a\\"]]},

  {"description": "url(a\\\\b)",
  "input": "url(a\\\\b)",
  "output": [["URI", "a\\b"]]},

  {"description": "url(a b\\)c)",
  "input": "url(a b\\c)",
  "output": [["URI_INVALID"]]},

  {"description": "url(a \"b)c\")",
  "input": "url(a \"b)c\")",
  "output": [["URI_INVALID"], ["IDENT", "c"], ["INVALID", ")"]]},

  {"description": "url(\"",
  "input": "url(\"",
  "output": [["URI_INVALID"]]},

  {"description": "url('",
  "input": "url('",
  "output": [["URI_INVALID"]]},

  {"description": "url(\")",
  "input": "url(\")",
  "output": [["URI_INVALID"]]},

  {"description": "url(')",
  "input": "url(')",
  "output": [["URI_INVALID"]]},

  {"description": "url(\"\"",
  "input": "url(\"\"",
  "output": [["URI_INVALID"]]},

  {"description": "url(\"'",
  "input": "url(\"'",
  "output": [["URI_INVALID"]]},

  {"description": "url(''",
  "input": "url(''",
  "output": [["URI_INVALID"]]},

  {"description": "url('\"",
  "input": "url('\"",
  "output": [["URI_INVALID"]]},

  {"description": "url(\"\")",
  "input": "url(\"\")",
  "output": [["URI", ""]]},

  {"description": "url(\"')",
  "input": "url(\"')",
  "output": [["URI_INVALID"]]},

  {"description": "url('\")",
  "input": "url('\")",
  "output": [["URI_INVALID"]]},

  {"description": "url('a')",
  "input": "url('a')",
  "output": [["URI", "a"]]},

  {"description": "url(\"a\")",
  "input": "url(\"a\")",
  "output": [["URI", "a"]]},

  {"description": "url('abcde')",
  "input": "url('abcde')",
  "output": [["URI", "abcde"]]},

  {"description": "url(\"abcde\")",
  "input": "url(\"abcde\")",
  "output": [["URI", "abcde"]]},

  {"description": "url( 'abcde')",
  "input": "url( 'abcde')",
  "output": [["URI", "abcde"]]},

  {"description": "url( \"abcde\")",
  "input": "url( \"abcde\")",
  "output": [["URI", "abcde"]]},

  {"description": "url('abcde' )",
  "input": "url('abcde' )",
  "output": [["URI", "abcde"]]},

  {"description": "url(\"abcde\" )",
  "input": "url(\"abcde\" )",
  "output": [["URI", "abcde"]]},

  {"description": "url( '\\'abcde')",
  "input": "url( '\\'abcde')",
  "output": [["URI", "'abcde"]]},

  {"description": "url( \"\\'abcde\")",
  "input": "url( \"\\'abcde\")",
  "output": [["URI", "'abcde"]]},

  {"description": "url( '\\\"abcde')",
  "input": "url( '\\\"abcde')",
  "output": [["URI", "\"abcde"]]},

  {"description": "url( \"\\\"abcde\")",
  "input": "url( \"\\\"abcde\")",
  "output": [["URI", "\"abcde"]]},

  {"description": "url( 'x\\'abcde')",
  "input": "url( 'x\\'abcde')",
  "output": [["URI", "x'abcde"]]},

  {"description": "url( \"x\\'abcde\")",
  "input": "url( \"x\\'abcde\")",
  "output": [["URI", "x'abcde"]]},

  {"description": "url( 'x\\\"abcde')",
  "input": "url( 'x\\\"abcde')",
  "output": [["URI", "x\"abcde"]]},

  {"description": "url( \"x\\\"abcde\")",
  "input": "url( \"x\\\"abcde\")",
  "output": [["URI", "x\"abcde"]]},

  {"description": "url( 'a(bcd)e')",
  "input": "url( 'a(bcd)e')",
  "output": [["URI", "a(bcd)e"]]},

  {"description": "url( \"a(bcd)e\")",
  "input": "url( \"a(bcd)e\")",
  "output": [["URI", "a(bcd)e"]]},

  {"description": "url( 'a(bcde')",
  "input": "url( 'a(bcde')",
  "output": [["URI", "a(bcde"]]},

  {"description": "url( \"a(bcde\")",
  "input": "url( \"a(bcde\")",
  "output": [["URI", "a(bcde"]]},

  {"description": "url( 'abcd)e')",
  "input": "url( 'abcd)e')",
  "output": [["URI", "abcd)e"]]},

  {"description": "url( \"abcd)e\")",
  "input": "url( \"abcd)e\")",
  "output": [["URI", "abcd)e"]]},

  {"description": "url( '\\a(bcd)e')",
  "input": "url( '\\a(bcd)e')",
  "output": [["URI", "\u000a(bcd)e"]]},

  {"description": "url( \"\\a(bcd)e\")",
  "input": "url( \"\\a(bcd)e\")",
  "output": [["URI", "\u000a(bcd)e"]]},

  {"description": "url( '\\a (bcd)e')",
  "input": "url( '\\a (bcd)e')",
  "output": [["URI", "\u000a(bcd)e"]]},

  {"description": "url( \"\\a (bcd)e\")",
  "input": "url( \"\\a (bcd)e\")",
  "output": [["URI", "\u000a(bcd)e"]]},

  {"description": "url( '\\Xa(bcd)e')",
  "input": "url( '\\Xa(bcd)e')",
  "output": [["URI", "Xa(bcd)e"]]},

  {"description": "url( \"\\Xa(bcd)e\")",
  "input": "url( \"\\Xa(bcd)e\")",
  "output": [["URI", "Xa(bcd)e"]]},

  {"description": "url( 'a b')",
  "input": "url( 'a b')",
  "output": [["URI", "a b"]]},

  {"description": "url( \"a b\")",
  "input": "url( \"a b\")",
  "output": [["URI", "a b"]]},

  {"description": "url( ' a b  ')",
  "input": "url( ' a b  ')",
  "output": [["URI", " a b  "]]},

  {"description": "url( \" a b  \")",
  "input": "url( \" a b  \")",
  "output": [["URI", " a b  "]]},

  {"description": "url( 'a b'c)",
  "input": "url( 'a b'c)",
  "output": [["URI_INVALID"]]},

  {"description": "url( \"a b\"c)",
  "input": "url( \"a b\"c)",
  "output": [["URI_INVALID"]]},

  {"description": "url( 'a b''c')",
  "input": "url( 'a b''c')",
  "output": [["URI_INVALID"]]},

  {"description": "url( \"a b\"\"c\")",
  "input": "url( \"a b\"\"c\")",
  "output": [["URI_INVALID"]]},

  {"description": "url( 'a b' c)",
  "input": "url( 'a b' c)",
  "output": [["URI_INVALID"]]},

  {"description": "url( \"a b\" c)",
  "input": "url( \"a b\" c)",
  "output": [["URI_INVALID"]]},

  {"description": "url( '\\",
  "input": "url( '\\",
  "output": [["URI_INVALID"], ["DELIM", "\\"]]},

  {"description": "url( \"\\)",
  "input": "url( \"\\",
  "output": [["URI_INVALID"], ["DELIM", "\\"]]},

  {"description": "url( 'x\\",
  "input": "url( 'x\\",
  "output": [["URI_INVALID"], ["DELIM", "\\"]]},

  {"description": "url( \"x\\)",
  "input": "url( \"x\\",
  "output": [["URI_INVALID"], ["DELIM", "\\"]]},

  {"description": "url('\u000a')",
  "input": "url('\u000a')",
  "output": [["URI_INVALID"], ["S"], ["INVALID", ")"]]},

  {"description": "url(\"\u000a\")",
  "input": "url(\"\u000a\")",
  "output": [["URI_INVALID"], ["S"], ["INVALID", ")"]]},

  {"description": "url('\u000d')",
  "input": "url('\u000d')",
  "output": [["URI_INVALID"], ["S"], ["INVALID", ")"]]},

  {"description": "url(\"\u000d\")",
  "input": "url(\"\u000d\")",
  "output": [["URI_INVALID"], ["S"], ["INVALID", ")"]]},

  {"description": "url('\u000d\u000a')",
  "input": "url('\u000d\u000a')",
  "output": [["URI_INVALID"], ["S"], ["INVALID", ")"]]},

  {"description": "url(\"\u000d\u000a\")",
  "input": "url(\"\u000d\u000a\")",
  "output": [["URI_INVALID"], ["S"], ["INVALID", ")"]]},

  {"description": "url('\u000c')",
  "input": "url('\u000c')",
  "output": [["URI_INVALID"], ["S"], ["INVALID", ")"]]},

  {"description": "url(\"\u000c\")",
  "input": "url(\"\u000c\")",
  "output": [["URI_INVALID"], ["S"], ["INVALID", ")"]]},

  {"description": "url-prefix()",
  "input": "url-prefix()",
  "output": [["URI_PREFIX", ""]]},

  {"description": "url-prefix(\"\")",
  "input": "url-prefix(\"\")",
  "output": [["URI_PREFIX", ""]]},

  {"description": "url-prefix('')",
  "input": "url-prefix('')",
  "output": [["URI_PREFIX", ""]]},

  {"description": "url-prefix(aaa)",
  "input": "url-prefix(aaa)",
  "output": [["URI_PREFIX", "aaa"]]},

  {"description": "url-prefix(\"abc\")",
  "input": "url-prefix(\"abc\")",
  "output": [["URI_PREFIX", "abc"]]},

  {"description": "url-prefix('abc')",
  "input": "url-prefix('abc')",
  "output": [["URI_PREFIX", "abc"]]},

  {"description": "url-prefix(\\4e00)",
  "input": "url-prefix(\\4e00)",
  "output": [["URI_PREFIX", "\u4e00"]]},

  {"description": "url-prefix(aa\"bb)",
  "input": "url-prefix(aa\"bb)",
  "output": [["URI_PREFIX_INVALID"]]},

  {"description": "url-prefix(aa'bb)",
  "input": "url-prefix(aa'bb)",
  "output": [["URI_PREFIX_INVALID"]]},

  {"description": "url-prefix(\"aa)",
  "input": "url-prefix(\"aa)",
  "output": [["URI_PREFIX_INVALID"]]},

  {"description": "url-prefix('aaa)",
  "input": "url-prefix('aaa)",
  "output": [["URI_PREFIX_INVALID"]]},

  {"description": "url-prefi\\x( a )",
  "input": "url-prefi\\x( a )",
  "output": [["URI_PREFIX", "a"]]},

  {"description": "u+",
  "input": "u+",
  "output": [["IDENT", "u"], ["PLUS"]]},

  {"description": "U+",
  "input": "U+",
  "output": [["IDENT", "U"], ["PLUS"]]},

  {"description": "u\\+",
  "input": "u\\+",
  "output": [["IDENT", "u+"]]},

  {"description": "u+4",
  "input": "u+4",
  "output": [["UNICODE_RANGE", "4"]]},

  {"description": "u+a",
  "input": "u+a",
  "output": [["UNICODE_RANGE", "a"]]},

  {"description": "u+B",
  "input": "u+B",
  "output": [["UNICODE_RANGE", "B"]]},

  {"description": "u+?",
  "input": "u+?",
  "output": [["UNICODE_RANGE", "?"]]},

  {"description": "u+X",
  "input": "u+X",
  "output": [["IDENT", "u"], ["PLUS"], ["IDENT", "X"]]},

  {"description": "u+/**/4",
  "input": "u+/**/4",
  "output": [["IDENT", "u"], ["PLUS"], ["NUMBER", "4"]]},

  {"description": "u+\\34",
  "input": "u+\\34",
  "output": [["IDENT", "u"], ["PLUS"], ["IDENT", "4"]]},

  {"description": "u+42",
  "input": "u+42",
  "output": [["UNICODE_RANGE", "42"]]},

  {"description": "u+4E0",
  "input": "u+4E0",
  "output": [["UNICODE_RANGE", "4E0"]]},

  {"description": "u+4e00",
  "input": "u+4e00",
  "output": [["UNICODE_RANGE", "4e00"]]},

  {"description": "u+4?2?",
  "input": "u+4?2?",
  "output": [["UNICODE_RANGE", "4?2?"]]},

  {"description": "u+4???",
  "input": "u+4???",
  "output": [["UNICODE_RANGE", "4???"]]},

  {"description": "u+4???12",
  "input": "u+4???12",
  "output": [["UNICODE_RANGE", "4???12"]]},

  {"description": "u+4123456",
  "input": "u+4123456",
  "output": [["UNICODE_RANGE", "412345"], ["NUMBER", "6"]]},

  {"description": "u+4123456em",
  "input": "u+4123456em",
  "output": [["UNICODE_RANGE", "412345"], ["DIMENSION", "6", "em"]]},

  {"description": "u+4-",
  "input": "u+4-",
  "output": [["UNICODE_RANGE", "4"], ["MINUS"]]},

  {"description": "u+4-?",
  "input": "u+4-?",
  "output": [["UNICODE_RANGE", "4"], ["MINUS"], ["DELIM", "?"]]},

  {"description": "u+4-1",
  "input": "u+4-1",
  "output": [["UNICODE_RANGE", "4-1"]]},

  {"description": "u+4-x",
  "input": "u+4-x",
  "output": [["UNICODE_RANGE", "4"], ["IDENT", "-x"]]},

  {"description": "u+4/**/-1",
  "input": "u+4/**/-1",
  "output": [["UNICODE_RANGE", "4"], ["MINUS"], ["NUMBER", "1"]]},

  {"description": "u+4-12",
  "input": "u+4-12",
  "output": [["UNICODE_RANGE", "4-12"]]},

  {"description": "u+4-eef",
  "input": "u+4-eef",
  "output": [["UNICODE_RANGE", "4-eef"]]},

  {"description": "u+4-ffff",
  "input": "u+4-ffff",
  "output": [["UNICODE_RANGE", "4-ffff"]]},

  {"description": "u+4-10000",
  "input": "u+4-10000",
  "output": [["UNICODE_RANGE", "4-10000"]]},

  {"description": "u+4-ffffff",
  "input": "u+4-ffffff",
  "output": [["UNICODE_RANGE", "4-ffffff"]]},

  {"description": "u+4-1234567",
  "input": "u+4-1234567",
  "output": [["UNICODE_RANGE", "4-123456"], ["NUMBER", "7"]]},

  {"description": "u+4-123?56",
  "input": "u+4-123?56",
  "output": [["UNICODE_RANGE", "4-123"], ["DELIM", "?"], ["NUMBER", "56"]]},

  {"description": "u+4--",
  "input": "u+4--",
  "output": [["UNICODE_RANGE", "4"], ["MINUS"], ["MINUS"]]},

  {"description": "u+4-->",
  "input": "u+4-->",
  "output": [["UNICODE_RANGE", "4"], ["CDC"]]},

  {"description": "u+4-/**/->",
  "input": "u+4-/**/->",
  "output": [["UNICODE_RANGE", "4"], ["MINUS"], ["MINUS"],
      ["GREATER"]]},

  {"description": "u+4--/**/>",
  "input": "u+4--/**/>",
  "output": [["UNICODE_RANGE", "4"], ["MINUS"], ["MINUS"],
      ["GREATER"]]},

  {"description": "\\u+4",
  "input": "\\u+4",
  "output": [["IDENT", "u"], ["PLUS"], ["NUMBER", "4"]]},

  {"description": "<",
  "input": "<",
  "output": [["DELIM", "<"]]},

  {"description": "<!",
  "input": "<!",
  "output": [["DELIM", "<"], ["EXCLAMATION"]]},

  {"description": "<!-",
  "input": "<!-",
  "output": [["DELIM", "<"], ["EXCLAMATION"], ["MINUS"]]},

  {"description": "<!--",
  "input": "<!--",
  "output": [["CDO"]]},

  {"description": "\\<!--",
  "input": "\\<!--",
  "output": [["IDENT", "<"], ["EXCLAMATION"], ["MINUS"], ["MINUS"]]},

  {"description": "<!--a",
  "input": "<!--a",
  "output": [["CDO"], ["IDENT", "a"]]},

  {"description": "<!-->",
  "input": "<!-->",
  "output": [["CDO"], ["GREATER"]]},

  {"description": "<!--->",
  "input": "<!--->",
  "output": [["CDO"], ["MINUS"], ["GREATER"]]},

  {"description": "<!---->",
  "input": "<!---->",
  "output": [["CDO"], ["CDC"]]},

  {"description": "<!>",
  "input": "<!>",
  "output": [["DELIM", "<"], ["EXCLAMATION"], ["GREATER"]]},

  {"description": "-",
  "input": "-",
  "output": [["MINUS"]]},

  {"description": "--",
  "input": "--",
  "output": [["MINUS"], ["MINUS"]]},

  {"description": "-->",
  "input": "-->",
  "output": [["CDC"]]},

  {"description": ";",
  "input": ";",
  "output": [["SEMICOLON"]]},

  {"description": ";;",
  "input": ";;",
  "output": [["SEMICOLON"], ["SEMICOLON"]]},

  {"description": "\\;",
  "input": "\\;",
  "output": [["IDENT", ";"]]},

  {"description": "{",
  "input": "{",
  "output": [["LBRACE"]]},

  {"description": "}",
  "input": "}",
  "output": [["RBRACE"]]},

  {"description": "[",
  "input": "[",
  "output": [["LBRACKET"]]},

  {"description": "]",
  "input": "]",
  "output": [["RBRACKET"]]},

  {"description": "(",
  "input": "(",
  "output": [["LPAREN"]]},

  {"description": ")",
  "input": ")",
  "output": [["RPAREN"]]},

  {"description": "((",
  "input": "((",
  "output": [["LPAREN"], ["LPAREN"]]},

  {"description": "()",
  "input": "()",
  "output": [["LPAREN"], ["RPAREN"]]},

  {"description": "\u0000",
  "input": "\u0000",
  "output": [["DELIM", "\u0000"]]},

  {"description": "\u0009",
  "input": "\u0009",
  "output": [["S"]]},

  {"description": "\u0009\u0009",
  "input": "\u0009\u0009",
  "output": [["S"]]},

  {"description": "\u0009 ",
  "input": "\u0009 ",
  "output": [["S"]]},

  {"description": "\u000a",
  "input": "\u000a",
  "output": [["S"]]},

  {"description": "\u000a\u000a",
  "input": "\u000a\u000a",
  "output": [["S"]]},

  {"description": "\u000d",
  "input": "\u000d",
  "output": [["S"]]},

  {"description": "\u000d\u000a",
  "input": "\u000d\u000a",
  "output": [["S"]]},

  {"description": "\u0009\u000a",
  "input": "\u0009\u000a",
  "output": [["S"]]},

  {"description": "\u000b",
  "input": "\u000b",
  "output": [["DELIM", "\u000b"]]},

  {"description": "\u000c",
  "input": "\u000c",
  "output": [["S"]]},

  {"description": "\u000f",
  "input": "\u000f",
  "output": [["DELIM", "\u000f"]]},

  {"description": " ",
  "input": " ",
  "output": [["S"]]},

  {"description": "   ",
  "input": "   ",
  "output": [["S"]]},

  {"description": "\u0009 ",
  "input": "\u0009 ",
  "output": [["S"]]},

  {"description": " \u0009",
  "input": " \u0009",
  "output": [["S"]]},

  {"description": "X\u0009",
  "input": "X\u0009",
  "output": [["IDENT", "X"], ["S"]]},

  {"description": "/",
  "input": "/",
  "output": [["DELIM", "/"]]},

  {"description": "/*",
  "input": "/*",
  "output": [["COMMENT_INVALID"]]},

  {"description": "/**",
  "input": "/**",
  "output": [["COMMENT_INVALID"]]},

  {"description": "/***",
  "input": "/***",
  "output": [["COMMENT_INVALID"]]},

  {"description": "/**/",
  "input": "/**/",
  "output": []},

  {"description": "/***/",
  "input": "/***/",
  "output": []},

  {"description": "/****/",
  "input": "/****/",
  "output": []},

  {"description": "/*  */",
  "input": "/*  */",
  "output": []},

  {"description": "/*\u000a*/",
  "input": "/*\u000a*/",
  "output": []},

  {"description": "/**/ ",
  "input": "/**/ ",
  "output": [["S"]]},

  {"description": " /**/ ",
  "input": " /**/ ",
  "output": [["S"], ["S"]]},

  {"description": "/*/**/",
  "input": "/*/**/",
  "output": []},

  {"description": "/*/**/*/",
  "input": "/*/**/*/",
  "output": [["STAR"], ["DELIM", "/"]]},

  {"description": "a(",
  "input": "a(",
  "output": [["FUNCTION", "a"]]},

  {"description": "A(",
  "input": "A(",
  "output": [["FUNCTION", "A"]]},

  {"description": "abc(",
  "input": "abc(",
  "output": [["FUNCTION", "abc"]]},

  {"description": "\\x(",
  "input": "\\x(",
  "output": [["FUNCTION", "x"]]},

  {"description": "\\a(",
  "input": "\\a(",
  "output": [["FUNCTION", "\u000a"]]},

  {"description": "a\\b(",
  "input": "a\\b(",
  "output": [["FUNCTION", "a\u000b"]]},

  {"description": "a\\a(",
  "input": "a\\a(",
  "output": [["FUNCTION", "a\u000a"]]},

  {"description": "a\\a b(",
  "input": "a\\a b(",
  "output": [["FUNCTION", "a\u000ab"]]},

  {"description": "a\\\u000d(",
  "input": "a\\\u000d(",
  "output": [["IDENT", "a"], ["DELIM", "\\"], ["S"], ["LPAREN"]]},

  {"description": "a\\\u000a(",
  "input": "a\\\u000a(",
  "output": [["IDENT", "a"], ["DELIM", "\\"], ["S"], ["LPAREN"]]},

  {"description": "a\\\u000d\u000a(",
  "input": "a\\\u000d\u000a(",
  "output": [["IDENT", "a"], ["DELIM", "\\"], ["S"], ["LPAREN"]]},

  {"description": "a\\\u000c(",
  "input": "a\\\u000c(",
  "output": [["IDENT", "a"], ["DELIM", "\\"], ["S"], ["LPAREN"]]},

  {"description": "a (",
  "input": "a (",
  "output": [["IDENT", "a"], ["S"], ["LPAREN"]]},

  {"description": "a\\ (",
  "input": "a\\ (",
  "output": [["FUNCTION", "a "]]},

  {"description": "a\\  (",
  "input": "a\\  (",
  "output": [["IDENT", "a "], ["S"], ["LPAREN"]]},

  {"description": "-(",
  "input": "-(",
  "output": [["MINUS"], ["LPAREN"]]},

  {"description": "\\-(",
  "input": "\\-(",
  "output": [["FUNCTION", "-"]]},

  {"description": "-a(",
  "input": "-a(",
  "output": [["FUNCTION", "-a"]]},

  {"description": "-1(",
  "input": "-1(",
  "output": [["MINUS"], ["NUMBER", "1"], ["LPAREN"]]},

  {"description": "-a_b(",
  "input": "-a_b(",
  "output": [["FUNCTION", "-a_b"]]},

  {"description": "--(",
  "input": "--(",
  "output": [["MINUS"], ["MINUS"], ["LPAREN"]]},

  {"description": "-->(",
  "input": "-->(",
  "output": [["CDC"], ["LPAREN"]]},

  {"description": "~",
  "input": "~",
  "output": [["TILDE"]]},

  {"description": " ~",
  "input": " ~",
  "output": [["TILDE"]]},

  {"description": "  ~",
  "input": "  ~",
  "output": [["TILDE"]]},

  {"description": "~a",
  "input": "~a",
  "output": [["TILDE"], ["IDENT", "a"]]},

  {"description": "~=",
  "input": "~=",
  "output": [["INCLUDES"]]},

  {"description": "~~=",
  "input": "~~=",
  "output": [["TILDE"], ["INCLUDES"]]},

  {"description": "|",
  "input": "|",
  "output": [["VBAR"]]},

  {"description": "||",
  "input": "||",
  "output": [["VBAR"], ["VBAR"]]},

  {"description": "|=",
  "input": "|=",
  "output": [["DASHMATCH"]]},

  {"description": "|= ",
  "input": "|= ",
  "output": [["DASHMATCH"], ["S"]]},

  {"description": "|=  ",
  "input": "|=  ",
  "output": [["DASHMATCH"], ["S"]]},

  {"description": "||=",
  "input": "||=",
  "output": [["VBAR"], ["DASHMATCH"]]},

  {"description": "^",
  "input": "^",
  "output": [["DELIM", "^"]]},

  {"description": "^^",
  "input": "^^",
  "output": [["DELIM", "^"], ["DELIM", "^"]]},

  {"description": "^=",
  "input": "^=",
  "output": [["PREFIXMATCH"]]},

  {"description": "^=\u0009",
  "input": "^=\u0009",
  "output": [["PREFIXMATCH"], ["S"]]},

  {"description": "^=  ",
  "input": "^=  ",
  "output": [["PREFIXMATCH"], ["S"]]},

  {"description": "^^=",
  "input": "^^=",
  "output": [["DELIM", "^"], ["PREFIXMATCH"]]},

  {"description": "$",
  "input": "$",
  "output": [["DELIM", "$"]]},

  {"description": "$$",
  "input": "$$",
  "output": [["DELIM", "$"], ["DELIM", "$"]]},

  {"description": "$a",
  "input": "$a",
  "output": [["DELIM", "$"], ["IDENT", "a"]]},

  {"description": "$=",
  "input": "$=",
  "output": [["SUFFIXMATCH"]]},

  {"description": "$= ",
  "input": "$= ",
  "output": [["SUFFIXMATCH"], ["S"]]},

  {"description": "$=  ",
  "input": "$=  ",
  "output": [["SUFFIXMATCH"], ["S"]]},

  {"description": "$==",
  "input": "$==",
  "output": [["SUFFIXMATCH"], ["MATCH"]]},

  {"description": "*",
  "input": "*",
  "output": [["STAR"]]},

  {"description": "**",
  "input": "**",
  "output": [["STAR"], ["STAR"]]},

  {"description": "*=",
  "input": "*=",
  "output": [["SUBSTRINGMATCH"]]},

  {"description": "*/**/=",
  "input": "*/**/=",
  "output": [["STAR"], ["MATCH"]]},

  {"description": "*= ",
  "input": "*= ",
  "output": [["SUBSTRINGMATCH"], ["S"]]},

  {"description": "*=  ",
  "input": "*=  ",
  "output": [["SUBSTRINGMATCH"], ["S"]]},

  {"description": "=",
  "input": "=",
  "output": [["MATCH"]]},

  {"description": "!",
  "input": "!",
  "output": [["EXCLAMATION"]]},

  {"description": "%",
  "input": "%",
  "output": [["DELIM", "%"]]},

  {"description": "&",
  "input": "&",
  "output": [["DELIM", "&"]]},

  {"description": ",",
  "input": ",",
  "output": [["COMMA"]]},

  {"description": " ,",
  "input": " ,",
  "output": [["COMMA"]]},

  {"description": "  ,",
  "input": "  ,",
  "output": [["COMMA"]]},

  {"description": " /**/,",
  "input": " /**/,",
  "output": [["S"], ["COMMA"]]},

  {"description": "+",
  "input": "+",
  "output": [["PLUS"]]},

  {"description": "+ ",
  "input": "+ ",
  "output": [["PLUS"], ["S"]]},

  {"description": " +",
  "input": " +",
  "output": [["PLUS"]]},

  {"description": "\u0009+",
  "input": "\u0009+",
  "output": [["PLUS"]]},

  {"description": "  +",
  "input": "  +",
  "output": [["PLUS"]]},

  {"description": "/",
  "input": "/",
  "output": [["DELIM", "/"]]},

  {"description": "<",
  "input": "<",
  "output": [["DELIM", "<"]]},

  {"description": ">",
  "input": ">",
  "output": [["GREATER"]]},

  {"description": " >",
  "input": " >",
  "output": [["GREATER"]]},

  {"description": "   >",
  "input": "   >",
  "output": [["GREATER"]]},

  {"description": ":",
  "input": ":",
  "output": [["COLON"]]},

  {"description": "::",
  "input": "::",
  "output": [["COLON"], ["COLON"]]},

  {"description": ":/**/:",
  "input": ":/**/:",
  "output": [["COLON"], ["COLON"]]},

  {"description": "?",
  "input": "?",
  "output": [["DELIM", "?"]]},

  {"description": "_",
  "input": "_",
  "output": [["IDENT", "_"]]},

  {"description": "`",
  "input": "`",
  "output": [["DELIM", "`"]]},

  {"description": "\u007f",
  "input": "\u007f",
  "output": [["DELIM", "\u007f"]]},

  {"description": "\u0080",
  "input": "\u0080",
  "output": [["IDENT", "\u0080"]]},

  {"description": ":not(",
  "input": ":not(",
  "output": [["COLON"], ["FUNCTION", "not"]]},

  {"description": ":no\\t(",
  "input": ":no\\t(",
  "output": [["COLON"], ["FUNCTION", "not"]]},

  {"description": ":/**/not(",
  "input": ":/**/not(",
  "output": [["COLON"], ["FUNCTION", "not"]]}
]}