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