N
U
R
N
R
R
A
B
N
B
R
B
N
U
N
N
B
R
A
U
B
A
A
R
N
U
B
N
A
A
B
B
A
B
A
R
B
R
U
B
A
U
R
B
A
R
N
A
U
N
R
U
U
U
U