77\u0037 (C99)\U000037 (C99)\x37 (encoding-dependent)\067 (encoding-dependent)\u{37} (C++23)\x{37} (C++23, encoding-dependent)\o{067} (C++23, encoding-dependent)\U00000037\u0037\x37 (encoding-dependent)\067 (encoding-dependent)\u0037\u{37}\u0037\x37\37\000037=37%37