R 20

R 20R 20R 20R 20R 20R 20
R 20R 20R 20R 20R 20R 20
R 20R 20R 20R 20R 20R 20R 20R 20R 20R 20R 20R 20R 20R 20R 20R 20R 20R 20R 20R 20R 20R 20R 20R 20R 20R 20R 20R 20R 20R 20R 20R 20R 20R 20R 20R 20