GRAPH (#nodes #edges id uu vv ww xx yy zz):
10 30 geo(0,{10,10,3,0.200,0.000,0.000}) 10 

VERTICES (index name u v w x y z):
0 0 4 0 
1 1 2 9 
2 2 8 1 
3 3 6 4 
4 4 8 3 
5 5 8 6 
6 6 2 3 
7 7 9 3 
8 8 3 4 
9 9 2 4 

EDGES (from-node to-node length a b):
0 8 4 0 
0 7 6 0 
0 6 4 0 
0 3 4 0 
0 1 9 0 
1 6 6 0 
1 2 10 0 
2 7 2 0 
4 9 6 0 
4 8 5 0 
4 6 6 0 
5 9 6 0 
6 9 1 0 
6 8 1 0 
6 7 7 0