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: galley, head, suits, deck, dock
Example Output: suits

Example Input: cool, unflappalbe, freezing, warm, chill
Example Output:
unflappalbe