Denny couldn't find his hairbrush.  He looked everywhere for it.  Under and over, up and down, it was not where he thought it would be.  So he closed the door behind him and continued his systematic search.  Where might Denny have looked first?
bedroom drugstore house
bedroom
you would not look under a house or a drugstore for a hairbrush, but you would look under a bed.
under and over,up and down