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:
condominium, duplex, studio, flat, level

Ex Output:
level


Ex Input:
beautiful, classy, dull, comfortable, fine

Ex Output:
comfortable


Ex Input:
relaxed, handsome, fine, high quality, classy

Ex Output:

relaxed