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R r 0 1 t

R r 0 1 tR r 0 1 tR r 0 1 tR r 0 1 tR r 0 1 tR r 0 1 t
R r 0 1 tR r 0 1 tR r 0 1 tR r 0 1 tR r 0 1 tR r 0 1 t
R r 0 1 tR r 0 1 tR r 0 1 tR r 0 1 tR r 0 1 tR r 0 1 tR r 0 1 tR r 0 1 tR r 0 1 tR r 0 1 tR r 0 1 tR r 0 1 tR r 0 1 tR r 0 1 tR r 0 1 tR r 0 1 tR r 0 1 tR r 0 1 tR r 0 1 tR r 0 1 tR r 0 1 tR r 0 1 tR r 0 1 tR r 0 1 tR r 0 1 tR r 0 1 tR r 0 1 tR r 0 1 tR r 0 1 tR r 0 1 tR r 0 1 tR r 0 1 tR r 0 1 tR r 0 1 tR r 0 1 tR r 0 1 t