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