A B
B A
---
1 1 0 1 0 1 0 1 1 1 1 1 0 1 0 1 1
1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 
1 0 1 0 1 1 1 0 1 1 0 1 1 1 1 0 1 
A 0 1 0 1 1 1 0 0 0 0 1 1 1 1 0 B
1 0 1 0 1 1 1 0 1 1 0 1 1 1 1 0 1 
1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 
1 1 0 1 0 1 0 1 1 1 1 1 0 1 0 1 1
