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:
cool, unruffled, funny, chill, ethical

Ex Output:
chill


Ex Input:
provision, frank, hot dog, goodies, harsh

Ex Output:
harsh


Ex Input:
smooshed, cabin, flat, apartment, duplex

Ex Output:

smooshed