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:
duplex, studio, flat, paved, squashed

Ex Output:
paved


Ex Input:
windlass, excavator, crane, hummingbird, steam roller

Ex Output:
hummingbird


Ex Input:
flaxen, even, fair, tangle, milky

Ex Output:

tangle