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: nervous, bored, emotional supports, chord, fret
Example Output: chord

Example Input: flutter, swim, bird, fly, car
Example Output:
bird