N
H
N
H
H
N
N
B
N
H
H
B
N
N
N
H
N
N
A
H
N
D
A
H
D
A
A
A
B
A
N
N
D
H
N
B
N
H
D
H
N
N
N
A
B
N
N
N
B
N
N
H
A
H
N
N
A
A
B
N
B
N