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: baby animals 
Words: bambi, cub, doe, lust, fawn

Output: lust


Input: Consider Input: Category: bird 
Words: crane, concrete pourer, goose, hoist, duck

Output: concrete pourer


Input: Consider Input: Category: boxing terminology 
Words: fight, deck, box, chips, apron


Output: chips