D
A
C
C
S
D
S
S
D
D
C
A
A
C
A
B
S
C
D
D
B
B
S
B
B
D
A
S
A
D
D
C
A
B
C
S
B
C
C
S
A
D
C
D
D
S
D
B
A
S
B
S
B
B
A
A
B
B
D
S
A
A
S
A
S
S
C
B
C
B
A
C
S
A
B
C
C
S
C
A
D
D
D
B