/usr/share/doc/planarity/samples/Petersen.0-based.txt.K4Search.out.txt

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

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