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: merchandise, angry, ecstatic, content, joyful
Example Output: merchandise

Example Input: Category: baby animals 
Words: follow, colt, fawn, cub, calf
Example Output: follow

Example Input: Category: aesthetic characteristic 
Words: fair, ghostly, milky, texture, stormy
Example Output:
stormy