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:
data sets, water, timely, current, late

Ex Output:
water


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

Ex Output:
opposite of up


Ex Input:
current, late, belated, delayed, blue

Ex Output:

blue