size 6x8
0 1 1 1 1 1 1 0
1 1 2 2 2 2 1 1
1 2 4 4 2 2 2 1
1 2 1 2 3 3 3 1
1 2 2 2 1 6 4 1
1 1 1 1 1 1 1 1