1 7 2

1 7 21 7 21 7 21 7 2
1 7 21 7 21 7 21 7 21 7 21 7 21 7 21 7 2
1 7 21 7 21 7 21 7 21 7 21 7 21 7 21 7 21 7 21 7 21 7 21 7 2
1 7 21 7 21 7 21 7 21 7 21 7 21 7 21 7 21 7 21 7 21 7 21 7 21 7 21 7 21 7 21 7 2
1 7 21 7 21 7 21 7 21 7 21 7 21 7 21 7 2