>>writegraph3d planar <<
1 0 0 0 2 3 7 4
2 0 0 0 1 5 6 3
3 0 0 0 1 2 6
4 0 0 0 1 8 9 5
5 0 0 0 2 4 9
6 0 0 0 3 2 9 7
7 0 0 0 1 6 10 8
8 0 0 0 4 7 10
9 0 0 0 5 4 10 6
10 0 0 0 8 7 9
0
