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

Example Input: cold, deal, make the grade, unprejudiced, fair
Example Output: unprejudiced

Example Input: flyaway, hot, classy, fine, level
Example Output:
flyaway