Edited by author 24.10.2004 08:18

Edited by author 24.10.2004 08:19

9 12
9 4
4 8
8 7
7 9
9 5
5 2
2 6
6 8
4 3
3 2
2 1
1 7
here four cycles
5 8
1 2
2 3
3 4
1 4
2 5
5 4
1 5
5 3
also four cycles