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: motherboard, schedule appointments, schedule, file, type
Example Output: motherboard

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

Example Input: jail, probation, fine, classy, firstrate
Example Output:
classy