B
B
A
S
P
A
B
S
B
P
B
P
C
S
A
P
P
B
P
S
C
A
B
C
P
C
P
A
C
S
P
P
A
S
B
S
C
S
B
C
P
B
P
B
C
P
B
P
B
C
A
A
C
S
S
S
C
C
A
S
S
A
A
S
P
S
A
C
B
A
C
A
A
B
C