% HSE example 2; March 2021
*Vertices 12
1 "a" 
2 "b" 
3 "c" 
4 "d" 
5 "e" 
6 "f" 
7 "g" 
8 "h" 
9 "i" 
10 "j" 
11 "k" 
12 "l" 
*Arcslist
1 2 4 6
2 1 6
3 2 3 7 7
5 3 6 8
6 11
8 4 12
10 8
12 5 7 8
*Edgeslist
2 5
3 4
5 7
6 8