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.

Example Input: cow, fish, dog, sea turtle, hunt
Example Output: hunt

Example Input: comfortable, ok, decent, fine, suspension
Example Output: suspension

Example Input: fix, falsification, smear, heavy, fudge
Example Output:
heavy