7

1 1 1 1 1 1 0 

1 1 1 1 1 1 1 

1 1 1 1 1 1 1 

1 1 1 1 1 1 1 

1 1 1 1 1 1 0 

1 1 1 1 1 1 1 
1 1 1 1 1 1 1 
