1, 2, 3, 6, 8, 4, 7, 5, 9, 18, 23, 16, 22, 17, 24, 12, 20, 10, 19, 11, 21, 15, 26, 13, 25, 14, 27, 54, 68, 52, 67, 53, 69, 48, 65, 46, 64, 47, 66, 51, 71, 49, 70, 50, 72, 36, 59, 34, 58, 35, 60, 30, 56, 28, 55, 29, 57, 33, 62, 31, 61, 32, 63, 45, 77, 43, 76, 44, 78, 39, 74, 37