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R r1 r2

R r1 r2R r1 r2R r1 r2R r1 r2R r1 r2R r1 r2
R r1 r2R r1 r2R r1 r2R r1 r2R r1 r2R r1 r2
R r1 r2R r1 r2R r1 r2R r1 r2R r1 r2R r1 r2R r1 r2R r1 r2R r1 r2R r1 r2R r1 r2R r1 r2R r1 r2R r1 r2R r1 r2R r1 r2R r1 r2R r1 r2R r1 r2R r1 r2R r1 r2R r1 r2R r1 r2R r1 r2R r1 r2R r1 r2R r1 r2R r1 r2R r1 r2R r1 r2R r1 r2R r1 r2R r1 r2R r1 r2R r1 r2R r1 r2