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F 2x

F 2xF 2xF 2xF 2x
F 2xF 2xF 2xF 2xF 2xF 2xF 2xF 2x
F 2xF 2xF 2xF 2xF 2xF 2xF 2xF 2xF 2xF 2xF 2xF 2x
F 2xF 2xF 2xF 2xF 2xF 2xF 2xF 2xF 2xF 2xF 2xF 2xF 2xF 2xF 2xF 2x
F 2xF 2xF 2xF 2xF 2xF 2xF 2xF 2x