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