1, 2, 3, 5, 4, 6, 7, 9, 8, 11, 10, 12, 13, 15, 14, 17, 16, 19, 21, 18, 23, 25, 20, 22, 24, 27, 29, 26, 28, 31, 33, 30, 35, 32, 37, 34, 39, 41, 36, 43, 38, 45, 40, 42, 47, 49, 51, 53, 44, 46, 55, 48, 57, 50, 59, 52, 61, 54, 56, 63, 58, 65, 67, 60, 62, 69, 64, 71, 66, 68, 73, 75
