WCWC\u0057\u0043 (C99)\U000057\U000043 (C99)\x57\x43 (encoding-dependent)\127\103 (encoding-dependent)\u{57}\u{43} (C++23)\x{57}\x{43} (C++23, encoding-dependent)\o{127}\o{103} (C++23, encoding-dependent)\U00000057\U00000043\u0057\u0043\x57\x43 (encoding-dependent)\127\103 (encoding-dependent)\u0057\u0043\u{57}\u{43}\u0057\u0043\x57\x43\57\43\000057\000043=57=43%57%43