/usr/share/doc/planarity/samples/Petersen.txt.PlanarEmbed.out.txt

N=10
1: 0
2: 3 7 0
3: 2 4 8 0
4: 3 5 9 0
5: 4 10 0
6: 8 9 0
7: 9 10 2 0
8: 10 6 3 0
9: 6 7 4 0
10: 5 7 8 0

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