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, melancholy, below, loveful, kind
Example Output: below

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

Example Input: Category: nutritional value 
Words: area, sugar, sugars, fat, iron
Example Output:
area