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:
flyaway, penalty, prime, fine, comfortable

Ex Output:
comfortable


Ex Input:
descending, disgusted, emotionalities, emotional supports, down

Ex Output:
descending


Ex Input:
crying, emotionalities, strap lock, concerned, fret

Ex Output:

strap lock