7
0 1 0 0 0 1 1 
1 0 1 0 0 0 0 
0 1 0 0 1 1 0 
0 0 0 0 0 0 0 
0 0 1 0 0 1 0 
1 0 1 0 1 0 0 
1 0 0 0 0 0 0 

1 1 1 1 1 3 3 
