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:
comfortable, ok, decent, fine, suspension

Ex Output:
suspension


Ex Input:
trustworthy, decent, fair, tone, ok

Ex Output:
tone


Ex Input:
dive, fly, cockroach, spider, glide

Ex Output:

glide