0, 1, 2, 3, 5, 6, 4, 7, 8, 9, 11, 12, 15, 19, 20, 16, 21, 22, 10, 13, 14, 17, 23, 24, 18, 25, 26, 27, 29, 30, 33, 37, 38, 34, 39, 40, 45, 49, 50, 57, 65, 66, 58, 67, 68, 46, 51, 52, 59, 69, 70, 60, 71, 72, 28, 31, 32, 35, 41, 42, 36, 43, 44, 47, 53, 54, 61, 73