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: invent, smuggled, smear, fudge, pie
Example Output: pie

Example Input: bow, duck, sheep, goose, geese
Example Output: bow

Example Input: clime, fine, fair, trustworthy, unjust
Example Output:
clime