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