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