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:
icy, hot, cool, refreshing, relaxed

Ex Output:
relaxed


Ex Input:
duplex, studio, flat, paved, squashed

Ex Output:
paved


Ex Input:
flap, pounce, fly, run, cockroach

Ex Output:

flap