You hang up two strings of lights outside your house. Usually each string plugs into the previous string and it all works. But if you get one string backwards

You hang up two strings of lights outside your house. Usually each string plugs into the previous string and it all works. But if you get one string backwards instead of having a male and female connector to hook them together you have two males or two females. Taking down and putting up a long string of lights again is a huge hassle. But if you could just buy this one little cable…