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X1 x2 2

X1 x2 2X1 x2 2X1 x2 2X1 x2 2
X1 x2 2X1 x2 2X1 x2 2X1 x2 2X1 x2 2X1 x2 2X1 x2 2X1 x2 2
X1 x2 2X1 x2 2X1 x2 2X1 x2 2X1 x2 2X1 x2 2X1 x2 2X1 x2 2X1 x2 2X1 x2 2X1 x2 2X1 x2 2
X1 x2 2X1 x2 2X1 x2 2X1 x2 2X1 x2 2X1 x2 2X1 x2 2X1 x2 2X1 x2 2X1 x2 2X1 x2 2X1 x2 2X1 x2 2X1 x2 2X1 x2 2X1 x2 2
X1 x2 2X1 x2 2X1 x2 2X1 x2 2X1 x2 2X1 x2 2X1 x2 2X1 x2 2