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: weather 
Words: tangle, ghostly, fair, raining, sunny
Example Output: ghostly

Example Input: Category: ocean 
Words: flow, current, course, moon, dastards
Example Output: dastards

Example Input: Category: boxing terminology 
Words: deck, blocking, punch, draw, box
Example Output:
draw