C
V
V
V
V
V
C
V
V
V
N
N
V
C
V
C
N
N
C
N
N
N
N
V
C
C
N
C
V
N
C
C
N
C
V
N
N
N
N
N
N
C
V
C
C
C
C
V
C
V
C
V