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:
fair, make the grade, trustworthy, alright, just

Ex Output:
make the grade


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

Ex Output:
thin


Ex Input:
swallow, heron, crane, flamingo, tackle

Ex Output:

tackle