1, 2, 3, 5, 4, 6, 7, 10, 9, 8, 11, 13, 12, 14, 15, 19, 16, 18, 17, 21, 20, 22, 23, 26, 25, 24, 29, 28, 27, 30, 31, 36, 32, 33, 34, 37, 35, 38, 39, 42, 40, 41, 43, 45, 46, 44, 47, 51, 49, 50, 48, 53, 52, 56, 54, 58, 55, 57, 59, 61, 60, 62, 64, 69, 63, 65, 66, 68, 67, 70, 71, 74