3838\u0033\u0038 (C99)\U000033\U000038 (C99)\x33\x38 (encoding-dependent)\063\070 (encoding-dependent)\u{33}\u{38} (C++23)\x{33}\x{38} (C++23, encoding-dependent)\o{063}\o{070} (C++23, encoding-dependent)\U00000033\U00000038\u0033\u0038\x33\x38 (encoding-dependent)\063\070 (encoding-dependent)\u0033\u0038\u{33}\u{38}\u0033\u0038\x33\x38\33\38\000033\000038=33=38%33%38