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X2 x 1 y2

X2 x 1 y2X2 x 1 y2X2 x 1 y2X2 x 1 y2X2 x 1 y2X2 x 1 y2X2 x 1 y2X2 x 1 y2X2 x 1 y2X2 x 1 y2X2 x 1 y2X2 x 1 y2X2 x 1 y2X2 x 1 y2X2 x 1 y2X2 x 1 y2X2 x 1 y2X2 x 1 y2X2 x 1 y2X2 x 1 y2X2 x 1 y2X2 x 1 y2X2 x 1 y2X2 x 1 y2X2 x 1 y2X2 x 1 y2X2 x 1 y2X2 x 1 y2X2 x 1 y2X2 x 1 y2X2 x 1 y2X2 x 1 y2X2 x 1 y2X2 x 1 y2X2 x 1 y2X2 x 1 y2X2 x 1 y2X2 x 1 y2X2 x 1 y2X2 x 1 y2X2 x 1 y2X2 x 1 y2X2 x 1 y2X2 x 1 y2X2 x 1 y2X2 x 1 y2X2 x 1 y2X2 x 1 y2