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: group, clan, hamburger, club, bar
Example Output: hamburger

Example Input: falsification, banned, mangle, chocolate cake, fudge
Example Output: chocolate cake

Example Input: heavy, thin, fat, ugly, large
Example Output:
heavy