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:
camp, fish, iguana, hike, kayak

Ex Output:
iguana


Ex Input:
fat, calories, thin, salt, vitamin c

Ex Output:
thin


Ex Input:
sunny, stormy, fair, windy, tone

Ex Output:

tone