R 2 c

R 2 cR 2 cR 2 cR 2 cR 2 cR 2 cR 2 cR 2 cR 2 cR 2 cR 2 cR 2 cR 2 cR 2 cR 2 cR 2 cR 2 cR 2 cR 2 cR 2 cR 2 cR 2 cR 2 cR 2 cR 2 cR 2 cR 2 cR 2 cR 2 cR 2 cR 2 cR 2 cR 2 cR 2 cR 2 cR 2 cR 2 cR 2 cR 2 cR 2 cR 2 cR 2 cR 2 cR 2 cR 2 cR 2 cR 2 cR 2 c