1, 15, 18, 19, 2, 21, 22, 23, 27, 29, 31, 37, 4, 43, 45
1, 15, 18, 19, 2, 21, 22, 23, 27, 29, 31, 37, 4, 43, 45, 1, 4, 5, 7