ABAB\u0041\u0042 (C99)\U000041\U000042 (C99)\x41\x42 (encoding-dependent)\101\102 (encoding-dependent)\u{41}\u{42} (C++23)\x{41}\x{42} (C++23, encoding-dependent)\o{101}\o{102} (C++23, encoding-dependent)\U00000041\U00000042\u0041\u0042\x41\x42 (encoding-dependent)\101\102 (encoding-dependent)\u0041\u0042\u{41}\u{42}\u0041\u0042\x41\x42\41\42\000041\000042=41=42%41%42