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