#list of vertices
A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
P
Q
R
S
T
#list of edges
A->B
A->F
A->C
A->D
A->H
A->E
B->F
F->C
C->D
D->H
H->E
E->B
E->O
H->O
D->N
N->H
M->N
M->D
M->G
G->D
C->G
L->C
S->G
S->L
R->L
R->K
K->C
F->K
T->F
T->B
T->E
E->I
I->T
I->P
P->T
T->Q
J->P
J->Q
Q->F