artis-test/data/simple/gggp/graphe/graphe_0.txt

7 8
12 13
12 7
13 7
14 15
14 12
15 16
15 12
16 17
16 12
17 12
18 19
18 8
19 20
19 8
20 8
21 22
21 19
22 23
22 19
23 19
26 27
29 27
29 28
30 27
30 28