don't worry about one-liner solutions, keep solving katas and you will spit one-liners too! I experienced that

I have seen a lot solutions that seem a LOT simpler than what I have done. In fact, most are one liners.
I read the problem in the way that I had to check if the number of WUB before, between words and after the last one were correct with the way Polycarpus inserts the dubset. It took sometimes to complete, Lol urgh.