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, brownie, unlicensed, cake, pudding
Example Output: unlicensed

Example Input: club, hero, lettuce, bar, toast
Example Output: bar

Example Input: walk, run, bats, eagle, fly
Example Output:
walk