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:
emotionalities, opposite of up, down, miserable, ashamed

Ex Output:
opposite of up


Ex Input:
answer, answer calls, space, file, schedule

Ex Output:
space


Ex Input:
car, soar, beetle, bike, fly

Ex Output:

beetle