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: crying, truss rod, angry, emotional supports, fret
Example Output: truss rod

Example Input: board, sad, truss rod, jack, fret
Example Output:
sad