3
6 0 0 0 0 0 8 0 3 
0 4 0 7 0 0 0 0 0 
0 0 0 0 0 0 0 0 0 
0 0 0 5 0 4 0 7 0 
3 0 0 2 0 0 0 0 0 
1 0 6 0 0 0 0 0 0 
0 2 0 0 0 0 0 5 0 
0 0 0 0 8 0 6 0 0 
0 0 0 0 1 0 0 0 0 
