1,1,\u0031\u002C (C99)\U000031\U00002C (C99)\x31\x2C (encoding-dependent)\061\054 (encoding-dependent)\u{31}\u{2C} (C++23)\x{31}\x{2C} (C++23, encoding-dependent)\o{061}\o{054} (C++23, encoding-dependent)\U00000031\U0000002C\u0031\u002C\x31\x2C (encoding-dependent)\061\054 (encoding-dependent)\u0031\u002C\u{31}\u{2C}\u0031\u002C\x31\x2C\31\2C\000031\00002C=31=2C%31%2C