0	S
0	A	15
0	B	10
0	C	15
0	D	15
A	E	7
B	A	5
B	F	5
C	F	10
C	G	7
D	G	10
E	F	5
E	H	4
E	I	15
F	G	5
F	I	15
G	I	15
H	J	7
I	H	7
I	K	30
I	L	4
J	S	15
K	J	10
K	S	20
L	S	15