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: fudge, banned, brownie, unwarranted, fib
Example Output: brownie

Example Input: fair, impartial, tone, well, balanced
Example Output: tone

Example Input: backward, left, kind, down, descending
Example Output:
kind