1, 2, 4, 5, 6, 8
1, 2, 4, 5, 6, 8, 1, 3, 7, 9
1, 2, 4, 5, 6, 8, 1, 3, 7, 9, 1, 11, 13, 15, 16, 17, 2, 4, 5, 6, 7