N
R
N
R
R
U
R
N
U
R
N
N
R
N
U
U
N
R
U
U
U
N
N
U
N
N
R
N
N
R
R
N
R
U
R
N
U
N
R
R
U
R
R
U
R
U
U
R
R
N
R
U
N
R
R
N
U
N
N
N
N
N
N
U
N
U
N
U
U
N
U
U
R
N
U
N
R
R
U
N
R
N
U
N
N
N
N
R
U
N
U
R
U
R
N
R
R
R
R
R
R
N
R
U
U
U
N
U
R
R
N
R
U
U
U
N
R
R
U
U
U
N
U
R
U
U
U
N
N
N
N
R
U
U
R
R
R
U
U
R
U
N
U
N
R
U
U
U
N
U
N
R
R
N
N
R
R
R
N
U
R
U
U
U
U
R
R
N
R
R
U
U
R
N
N
N
N
N
U
N
N
U
U
R
N
N
R
R
R
U
U
R
N