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:
foot, knee, eye, leg, ounce

Ex Output:
ounce


Ex Input:
condominium, duplex, studio, flat, level

Ex Output:
level


Ex Input:
crane, davit, swift, upraise, hoist

Ex Output:

swift