# no solution !
 5 3 0 0 7 0 0 0 0
 6 0 0 1 9 5 0 0 0
 0 9 8 0 0 0 0 6 0
 8 0 0 0 6 0 0 0 3
 4 0 0 8 0 3 0 0 1
 7 0 0 0 2 0 0 0 6
 0 0 6 0 0 0 2 8 0
 0 0 0 4 1 9 0 0 5
 0 0 0 0 8 0 0 7 9