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