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: firm, shareholders, common, alignment, taut
Example Output: taut

Example Input: exquisite, dull, high quality, fine, acceptable
Example Output: acceptable

Example Input: inferno, fire, pay, let go, scold
Example Output:
inferno