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2 x2 1 7

2 x2 1 72 x2 1 72 x2 1 72 x2 1 72 x2 1 72 x2 1 7
2 x2 1 72 x2 1 72 x2 1 72 x2 1 72 x2 1 72 x2 1 7
2 x2 1 72 x2 1 72 x2 1 72 x2 1 72 x2 1 72 x2 1 72 x2 1 72 x2 1 72 x2 1 72 x2 1 72 x2 1 72 x2 1 72 x2 1 72 x2 1 72 x2 1 72 x2 1 72 x2 1 72 x2 1 72 x2 1 72 x2 1 72 x2 1 72 x2 1 72 x2 1 72 x2 1 72 x2 1 72 x2 1 72 x2 1 72 x2 1 72 x2 1 72 x2 1 72 x2 1 72 x2 1 72 x2 1 72 x2 1 72 x2 1 72 x2 1 7