0, 1, 2, 3, 4, 5, 6, 8, 7, 9, 10, 11, 13, 12, 14, 15, 19, 21, 18, 16, 22, 20, 17, 23, 24, 25, 27, 26, 28, 29, 33, 35, 32, 30, 36, 34, 31, 37, 38, 39, 41, 40, 51, 52, 56, 58, 46, 47, 59, 50, 49, 42, 43, 60, 62, 55, 53, 64, 57, 48, 44, 63, 61, 54, 45, 65, 66, 67, 69, 68, 70, 71