NODES
A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
EDGES
A B 2
B C 2
C D 2
D E 2 
E F 2 
F G 2
G H 2
H I 2
I J 2
J K 2
A C 4
F I 4
J M 5
M N 1
N E 5
K L 5
L O 1
O D 5
B O 5
O N 1
N F 5
A L 5
L M 1
M G 5