8

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 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 1 

1 0 1 1 1 1 1 1 
