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