*Vertices 13 8
1 "A"
2 "B"
3 "C"
4 "D"
5 "E"
6 "F"
7 "G"
8 "H"
9 "x-1"
10 "x-2"
11 "x-3"
12 "x-4"
13 "x-5"
*Edges
1 10
1 13
2 12
3 10
3 11
4 11
5 12
5 13
6 12
8 11
8 13