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:
nervous, bored, emotional supports, chord, fret

Ex Output:
chord


Ex Input:
slow, shut, close, beside, out of service

Ex Output:
beside


Ex Input:
goat, mice, fish, bat, hunting

Ex Output:

hunting