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.

Ex Input:
hire, flame, pay, fire, ban

Ex Output:
flame


Ex Input:
fire, instruct, inferno, retire, scold

Ex Output:
inferno


Ex Input:
doorstep, dance hall, club, lettuce, burger

Ex Output:

dance hall