This is the shortest superstring problem : find the shortest string that contains a set of given strings as substrings. According to this IEEE paper (which you may not have access to unfortunately), solving this problem exactly is NP-complete . However, heuristic solutions are available.
I think you can use a Radix Tree. It costs some memory because of pointers to leafs and parents, but it is easy to match up strings (O(k) (where k is the longest string size).
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.