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