Given a category and a set of five words, find the word from the set that does not belong (i.e. is the least relevant) with the other words in the category. Words are separated by commas.

Ex Input:
Category: emotional display 
Words: buck, identity, culture, fawn, pester

Ex Output:
buck


Ex Input:
Category: baby animals 
Words: bambi, cub, doe, lust, fawn

Ex Output:
lust


Ex Input:
Category: food 
Words: frank, hot dog, provision, brash, sausage

Ex Output:

brash