C
B
R
V
L
B
V
B
C
C
R
C
R
R
R
B
R
C
B
V
R
V
L
L
V
L
V
C
V
L
C
R
C
B
L
B
R
V
R
C
V
B
V
C
V
L
V
R
L
V
B
B
V
L
L
V
L
L
R
B
C
R
L
L
R
C
C
C
L
B
B
C
B
R
B