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R f 4

R f 4R f 4R f 4R f 4R f 4R f 4
R f 4R f 4R f 4R f 4R f 4R f 4
R f 4R f 4R f 4R f 4R f 4R f 4R f 4R f 4R f 4R f 4R f 4R f 4R f 4R f 4R f 4R f 4R f 4R f 4R f 4R f 4R f 4R f 4R f 4R f 4R f 4R f 4R f 4R f 4R f 4R f 4R f 4R f 4R f 4R f 4R f 4R f 4