Exchange (6,6) and (1,8)
1 9
2 9
3 9
4 9
5 9
5 8
5 7
5 6
6 6
7 6
8 6
9 6
9 5
9 4
9 3
9 2
10 2
11 2

No exchange
1 1
2 1
3 1
4 1
5 1
6 1
7 1
8 1
9 1
10 1
11 1