UU\u0055 (C99)\U000055 (C99)\x55 (encoding-dependent)\125 (encoding-dependent)\u{55} (C++23)\x{55} (C++23, encoding-dependent)\o{125} (C++23, encoding-dependent)\U00000055\u0055\x55 (encoding-dependent)\125 (encoding-dependent)\u0055\u{55}\u0055\x55\55\000055=55%55