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.

Input: Consider Input: Category: boats 
Words: lifeline, stern, fold, deck, rudder

Output: fold


Input: Consider Input: Category: ocean 
Words: flow, current, course, moon, dastards

Output: dastards


Input: Consider Input: Category: outdoor sport activity 
Words: camp, fish, iguana, hike, kayak


Output: iguana