1 0 1 0 1 0 0 0 1 0
2 0 2 0 2 0 1 0 0 0
0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 1 2 3 0 1
1 2 3 4 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0
0 1 2 3 0 1 0 0 0 0
0 0 0 0 0 0 0 0 0 0
----------