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:
tide, current, flow, detests, whirlpool

Ex Output:
detests


Ex Input:
fair, mild, loyal, alright, trustworthy

Ex Output:
mild


Ex Input:
swim, bat, fish, canyoning, hunting

Ex Output:

bat