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D x 1 2x 2

D x 1 2x 2D x 1 2x 2D x 1 2x 2D x 1 2x 2D x 1 2x 2D x 1 2x 2
D x 1 2x 2D x 1 2x 2D x 1 2x 2D x 1 2x 2D x 1 2x 2D x 1 2x 2
D x 1 2x 2D x 1 2x 2D x 1 2x 2D x 1 2x 2D x 1 2x 2D x 1 2x 2D x 1 2x 2D x 1 2x 2D x 1 2x 2D x 1 2x 2D x 1 2x 2D x 1 2x 2D x 1 2x 2D x 1 2x 2D x 1 2x 2D x 1 2x 2D x 1 2x 2D x 1 2x 2D x 1 2x 2D x 1 2x 2D x 1 2x 2D x 1 2x 2D x 1 2x 2D x 1 2x 2D x 1 2x 2D x 1 2x 2D x 1 2x 2D x 1 2x 2D x 1 2x 2D x 1 2x 2D x 1 2x 2D x 1 2x 2D x 1 2x 2D x 1 2x 2D x 1 2x 2D x 1 2x 2