N
S
A
N
A
N
N
B
B
S
K
N
K
S
K
B
B
B
S
N
S
S
A
B
A
A
A
K
A
S
K
S
N
A
A
B
N
K
B
K
A
B
N
K
S
K
S
B
K
N