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:
sea turtle, whale, dog, fish, hunting

Ex Output:
hunting


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

Ex Output:
running.


Ex Input:
ok, wispy, relaxed, content, fine

Ex Output:

wispy