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:
variety, fair, warm, tangle, mild

Ex Output:
variety

Ex Input:
falsification, fib, invent, fudge, cupcake

Ex Output:
cupcake

Ex Input:
apartment, lined, house, condominium, flat

Ex Output:
lined