source: lemon-0.x/demo/coloring.lgf

@nodeset 
coords  label   
(162, 142)      10      
(169, -35)      9       
(-154, -37)     8       
(-1, 12)        7       
(-87, -197)     6       
(360, 54)       5       
(193, 257)      4       
(-89, 224)      3       
(-327, 46)      2       
(157, -150)     1       
(-282, -149)    0       
@uedgeset 
                label   
9       10      17      
1       9       15      
3       9       14      
2       8       4       
6       8       1       
0       8       0       
8       7       7       
0       6       2       
9       5       16      
4       5       13      
1       5       12      
10      4       18      
3       4       11      
10      3       19      
7       3       10      
1       3       6       
2       3       3       
0       2       5       
7       1       9       
6       1       8       
@end