2, 4, 6, 8, 10, 12, 14, 16, 18
2, 4, 6, 8, 10, 12, 14, 16, 38, 40, 42
1, 2, 4, 6, 8, 10, 12, 14, 16, 18
6, 8, 10, 12, 14, 16, 18
6, 8, 10, 12, 14, 16