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: direction 
Words: south, loveful, down, left, falling
Example Output: loveful

Example Input: Category: emotional status 
Words: fine, wispy, alert, calm, relaxed
Example Output: wispy

Example Input: Category: poker 
Words: apron, joker, cards, deck, draw
Example Output:
apron