1, 2, 4
1, 2, 4, 1, 11, 13, 2, 3, 4, 5, 6, 8, 9
1, 2, 4, 1, 11, 13, 2, 3, 4, 5, 6, 8, 9, 1, 10, 12, 14, 18, 3, 6, 8, 9