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: boxing terminology 
Words: pack, level, deck, corner, jab
Example Output: pack

Example Input: Category: baby animals 
Words: fawn, deer, buck, kitten, cajole
Example Output: cajole

Example Input: Category: animal 
Words: climbing, fish, cow, bat, cat
Example Output:
climbing