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