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