2, 4, 7
2, 4, 7, 1, 2, 3, 4, 7
2, 4, 7, 1, 2, 3, 4, 7, 1, 10, 11, 12, 14, 2, 20, 22, 24, 26, 28, 3, 30, 32, 4, 5, 6, 7, 8, 9