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