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: handsome, dull, flyaway, attractive, fine
Example Output: flyaway

Example Input: windlass, hummingbird, neck, crane, duck
Example Output: windlass

Example Input: ban, empower, water, fire, hire
Example Output:
water