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:
current, wave, whirlpool, sea, data sets

Ex Output:
data sets


Ex Input:
icy, hot, cool, refreshing, relaxed

Ex Output:
relaxed


Ex Input:
sugars, fat, thin, large, angular momentum

Ex Output:

sugars