Given a set of five words, generate the word from the set that does not belong (i.e. is the least relevant) with the other words. Words are separated by commas.

Ex Input:
running., close, bordering, nearer, touching

Ex Output:
running.


Ex Input:
warm, optimist, hot, relaxing, cool

Ex Output:
optimist


Ex Input:
fine, money, bright, neat, beautiful

Ex Output:

money