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