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