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	\problem{One Hundred and Fourty-Five Doors}

	Volodya asked, ``What plane did you fly during the air parade?'' His father sketched a formation of 9 planes.

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	``The number of planes to the right of me multiplied by the number of planes to the left of me is 3 less than it would have been if my plane had been 3 places to the right of me.'' How did Volodya solve the problem?

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