B
S
B
B
G
N
G
B
N
N
A
G
N
A
N
S
N
G
S
B
S
S
B
B
A
S
S
B
B
N
A
N
S
A
G
S
G
A
A
G
G
A
S
B
A
N
B
A
A
G
G
S
G
N
S
B
S
A
G
S
N
N
N
S
G
A
B
A
S
B
B
S
G
G
B
S
A
A
A
B
N
A
N
B
G
S
G
G
A
S
N
N
A
N
B
G
N
B
G