1, 10, 11, 12, 13, 14, 15, 17, 19, 2, 21, 23, 25, 27, 29, 3, 31, 33, 35, 37, 39, 4, 41, 43, 45, 47, 49, 5, 51, 55, 6, 7, 8, 9