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: fret, emotional supports, output cord, angry, concerned
Example Output: output cord

Example Input: Category: aesthetic characteristic 
Words: honorable, fair, variety, milky, even
Example Output: honorable

Example Input: Category: baby animals 
Words: calf, buck, fawn, kid, pester
Example Output:
pester