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