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: hire, flame, pay, fire, ban
Example Output: flame

Example Input: jog, waggle, pounce, fly, bats
Example Output: jog

Example Input: impartial, trustworthy, level, fair, equitable
Example Output:
level