c comentario1
c comentario2
p vertex 10
1: 2, 3, 4.
2: 1, 5, 9.
3: 1, 7, 8.
4: 1, 6, 10.
5: 2, 6, 8.
6: 4, 5, 7.
7: 3, 6, 9.
8: 3, 5, 10.
9: 2, 7, 10.
10: 4, 8, 9.