1.1.\u0031\u002E (C99)\U000031\U00002E (C99)\x31\x2E (encoding-dependent)\061\056 (encoding-dependent)\u{31}\u{2E} (C++23)\x{31}\x{2E} (C++23, encoding-dependent)\o{061}\o{056} (C++23, encoding-dependent)\U00000031\U0000002E\u0031\u002E\x31\x2E (encoding-dependent)\061\056 (encoding-dependent)\u0031\u002E\u{31}\u{2E}\u0031\u002E\x31\x2E\31\2E\000031\00002E=31=2E%31%2E