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: probation, ticket, exquisite, suspension, fine
Example Output: exquisite

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

Example Input: cow, bend, duck, horse, sheep
Example Output:
bend