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F x x 4 4x

F x x 4 4xF x x 4 4xF x x 4 4xF x x 4 4x
F x x 4 4xF x x 4 4xF x x 4 4xF x x 4 4xF x x 4 4xF x x 4 4xF x x 4 4xF x x 4 4x
F x x 4 4xF x x 4 4xF x x 4 4xF x x 4 4xF x x 4 4xF x x 4 4xF x x 4 4xF x x 4 4xF x x 4 4xF x x 4 4xF x x 4 4xF x x 4 4x
F x x 4 4xF x x 4 4xF x x 4 4xF x x 4 4xF x x 4 4xF x x 4 4xF x x 4 4xF x x 4 4xF x x 4 4xF x x 4 4xF x x 4 4xF x x 4 4xF x x 4 4xF x x 4 4xF x x 4 4xF x x 4 4x
F x x 4 4xF x x 4 4xF x x 4 4xF x x 4 4xF x x 4 4xF x x 4 4xF x x 4 4xF x x 4 4x