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