3
0 2 0 8 1 0 7 4 0 
7 0 0 0 0 3 1 0 0 
0 9 0 0 0 2 8 0 5 
0 0 9 0 4 0 0 8 7 
4 0 0 2 0 8 0 0 3 
1 6 0 0 3 0 2 0 0 
3 0 2 7 0 0 0 6 0 
0 0 5 6 0 0 0 0 8 
0 7 6 0 5 1 0 9 0 
