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