./i \
3 0 0 7 8 9 0 6 1 \
5 0 0 0 4 0 3 0 0 \
8 1 0 0 6 0 0 2 4 \
0 0 0 0 0 8 0 0 0 \
2 0 0 1 5 3 0 0 7 \
0 0 0 4 0 0 0 0 0 \
6 2 0 0 3 0 0 1 9 \
0 0 3 0 9 0 0 0 5 \
4 9 0 5 1 7 0 0 6 
    
