Half String

We are back on track with our regular lives, but regular lives thrust into the middle of the Holiday Season. I am trying to get some lights up in the house but I am running into this problem.

Shown above are two strings of lights. The string on the left works on the front half and the string on the right works on the back half.  Together, they make one good string with lots of extra bulbs in case one goes out...and you can find it. 

I believe this is all part of a huge Chinese conspiracy to take more of our money for lights whilst driving us insane at the same time.