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