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: ring, deck, pack, box, level
Example Output: pack

Example Input: unwarranted, fudge, pudding, lie, unlicensed
Example Output: pudding

Example Input: endure, brisk, trustworthy, warm, fair
Example Output:
trustworthy