(this script is currently broken)
As character names:
U+00EF LATIN SMALL LETTER I WITH DIAERESIS character (ï) U+00BF INVERTED QUESTION MARK character (¿) U+00BC VULGAR FRACTION ONE QUARTER character (¼)
As raw characters:

As a string of HTML entities:

In detail:
Character number 1 is decimal 239, hex 0xEF, octal \357, binary 11101111 U+00EF LATIN SMALL LETTER I WITH DIAERESIS : 0069 0308 Character number 2 is decimal 191, hex 0xBF, octal \277, binary 10111111 U+00BF INVERTED QUESTION MARK = turned question mark * Spanish x (question mark - 003F) x (reversed question mark - 2E2E) Character number 3 is decimal 188, hex 0xBC, octal \274, binary 10111100 U+00BC VULGAR FRACTION ONE QUARTER # <fraction> 0031 2044 0034