C
U
V
U
U
S
V
C
D
D
D
C
U
D
C
S
V
V
C
D
U
S
D
S
V
U
C
D
D
D
S
U
U
S
C
V
C
S
U
D
C
V
S
V
U
D
S
D
C
C
S
V
S
U
S
C
C
D
C
S
U
V
S
V
V
V
S
U
U
V
U
C
D
V