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