D
N
N
O
D
X
X
D
X
R
X
R
R
O
X
O
R
N
O
N
X
D
X
N
O
R
N
O
D
O
N
N
N
N
D
X
O
X
D
R
D
D
R
D
D
R
O
X
O
D
X
O
O
D
D
R
X
R
N
N
N
R
O
X
R
X
O
R
N
N
O
X
R
D