3434\u0033\u0034 (C99)\U000033\U000034 (C99)\x33\x34 (encoding-dependent)\063\064 (encoding-dependent)\u{33}\u{34} (C++23)\x{33}\x{34} (C++23, encoding-dependent)\o{063}\o{064} (C++23, encoding-dependent)\U00000033\U00000034\u0033\u0034\x33\x34 (encoding-dependent)\063\064 (encoding-dependent)\u0033\u0034\u{33}\u{34}\u0033\u0034\x33\x34\33\34\000033\000034=33=34%33%34