R
C
U
S
S
B
C
U
U
U
C
R
U
U
U
S
R
B
R
C
B
R
B
B
B
B
C
S
B
B
B
S
S
B
C
R
C
U
R
U
S
C
R
S
C
R
U
U
C
R
R
C
S
S