R
C
C
C
D
D
D
D
R
A
A
A
C
A
R
C
A
C
R
D
C
A
R
A
D
R
A
R
R
D
C
A
R
D
C
D
C
R
R
A
D
R
C
C
A
A
C
R
A
D
D
D