Start
A
8
Start
B
12
Start
C
10
A
D
20
A
B
8
B
E
20
B
F
10
B
G
15
C
G
20
D
E
12
E
F
15
E
H
18
F
H
4
F
G
12
G
H
25
H
J
20
H
Goal
18
I
J
15
J
Goal
10
done