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:
round, duplex, flat, smooshed, townhome

Ex Output:
smooshed


Ex Input:
fly, swim, car, beetle, grasshopper

Ex Output:
car


Ex Input:
winch, neck, goose, heron, crane

Ex Output:

winch