1, 2, 4, 6
1, 2, 4, 6, 1, 11, 2, 3, 4, 5, 6, 7, 9
1, 2, 4, 6, 1, 11, 2, 3, 4, 5, 6, 7, 9, 1, 10, 12, 14, 16, 18, 2, 3, 4, 5, 6, 7, 8