>>writegraph3d planar <<
1 0 0 0 9 10 3 4
2 0 0 0 10 5 6 3
3 0 0 0 1 2 6 11
4 0 0 0 1 11 8 5
5 0 0 0 9 4 8 2
6 0 0 0 2 8 12 3
7 0 0 0 12 8 11
8 0 0 0 4 7 6 5
9 0 0 0 10 1 5
10 0 0 0 9 2 1
11 0 0 0 12 7 4 3
12 0 0 0 7 11 6
0
