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.

Example Input: Category: emotional status 
Words: down, emotional state, loveful, ashamed, flat
Example Output: flat

Example Input: Category: baby animals 
Words: cub, identity, buck, fawn, kid
Example Output: identity

Example Input: Category: emotional display 
Words: culture, cajole, doe, lust, fawn
Example Output:
doe