4 0 0  0 0 0  2 3 0
0 0 2  0 5 0  0 0 8
0 0 0  1 0 7  0 0 4

0 0 0  0 0 3  0 7 0
9 0 0  8 0 2  0 0 3
0 5 0  4 0 0  0 0 0

7 0 0  9 0 1  0 0 0
5 0 0  0 4 0  8 0 0
0 1 6  0 0 0  0 0 9
