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: ecstatic, excited, content, activity, angry
Example Output: activity

Example Input: Category: poker 
Words: fold, suits, deck, sail, hearts
Example Output: sail

Example Input: Category: emotional status 
Words: emotional upsets, forward, loveful, remorseful, down
Example Output:
forward