IDID\u0049\u0044 (C99)\U000049\U000044 (C99)\x49\x44 (encoding-dependent)\111\104 (encoding-dependent)\u{49}\u{44} (C++23)\x{49}\x{44} (C++23, encoding-dependent)\o{111}\o{104} (C++23, encoding-dependent)\U00000049\U00000044\u0049\u0044\x49\x44 (encoding-dependent)\111\104 (encoding-dependent)\u0049\u0044\u{49}\u{44}\u0049\u0044\x49\x44\49\44\000049\000044=49=44%49%44