>>> from rectangles import rectangle_cont
>>> lrect = [((1, 3), (4, 8)), ((1, 1), (4, 8)), ((0, 0), (3, 4))]
>>> rectangle_cont ((2, 2), lrect)
((1, 1), (4, 8))
>>> rectangle_cont ((5, 6), lrect)
((5, 6), (5, 6))