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:
equitable, just, fair, loyal, even

Ex Output:
even


Ex Input:
level, flat, apartment, squashed, lined

Ex Output:
lined


Ex Input:
fair, well, medium, level, cold

Ex Output:

cold