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