guile-algorithms/graphs/example-graphs/graph-01.txt

A 1,1
B 1,2
C 1,3
D 1,4
E 1,5
F 2,1
G 2,2
H 2,3
I 2,5
J 3,1
K 3,2
L 3,3
M 3,5
N 4,1
O 4,5
P 5,1
Q 5,2
R 5,3
S 5,4
T 5,5

A -> F 1
A -> B 1
B -> A 1
B -> G 1
B -> C 1
C -> B 1
C -> H 1
C -> D 1
D -> C 1
D -> E 1
E -> D 1
E -> I 1
F -> A 1
F -> J 1
F -> G 1
G -> F 1
G -> B 1
G -> K 1
G -> H 1
H -> G 1
H -> L 1
H -> C 1
I -> E 1
I -> M 1
J -> N 1
J -> F 1
J -> K 1
K -> J 1
K -> G 1
K -> L 1
L -> K 1
L -> H 1
M -> I 1
M -> O 1
N -> J 1
N -> P 1
O -> M 1
O -> T 1
P -> N 1
P -> Q 1
Q -> P 1
Q -> R 1
R -> Q 1
R -> S 1
S -> R 1
S -> T 1
T -> S 1
T -> O 1