R x s

R x sR x sR x sR x sR x sR x s
R x sR x sR x sR x sR x sR x s
R x sR x sR x sR x sR x sR x sR x sR x sR x sR x sR x sR x sR x sR x sR x sR x sR x sR x sR x sR x sR x sR x sR x sR x sR x sR x sR x sR x sR x sR x sR x sR x sR x sR x sR x sR x s