
0 0 0  0 0 8  0 0 0
0 0 4  0 0 0  0 0 0
6 9 0  5 0 0  0 2 0

8 0 0  3 6 0  0 0 4
0 0 0  0 0 1  0 0 0
2 0 3  0 7 0  9 0 0

0 0 0  0 0 0  0 6 1
0 0 8  9 3 0  0 4 0
0 7 0  0 0 4  0 0 2

hard 
any comments may be put here
following data...

