A
n
C
n
C
S
n
N
N
S
S
N
S
N
C
n
C
n
A
n
N
A
S
A
A
n
S
S
N
N
N
C
C
A
S
n
N
A
C
A
N
n
C
N
n
S
N
N
n
C
A
S
S
A
S
n
C
S
A
C
n
A
A
n
C
S
N
C
A