WW\u0057 (C99)\U000057 (C99)\x57 (encoding-dependent)\127 (encoding-dependent)\u{57} (C++23)\x{57} (C++23, encoding-dependent)\o{127} (C++23, encoding-dependent)\U00000057\u0057\x57 (encoding-dependent)\127 (encoding-dependent)\u0057\u{57}\u0057\x57\57\000057=57%57