1, 10, 11, 12, 13, 15, 16, 17, 18, 2, 21, 25, 3, 30, 31, 34, 36, 37, 39, 4, 40, 41, 42, 43, 44, 45, 46, 47, 49, 5, 50, 52, 53, 54, 56, 6, 7, 8