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

Example Input: fire, hire, heat, inferno, earth
Example Output: hire

Example Input: wood, cup, glass, spyhole, fiberglass
Example Output:
cup