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: neat, alright, beautiful, level, fine
Example Output: alright

Example Input: instruct, remove, let go, fire, water
Example Output:
water