1, 10, 12, 13, 14, 16, 18, 19, 2, 20, 23, 24, 25, 26, 28, 29, 3, 30, 31, 34, 35, 36, 37, 39, 4, 40, 41, 42, 43, 44, 45, 46, 5, 50, 52, 6, 7, 8