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: bird 
Words: dump truck, pelican, goose, crane, derrick

Output: dump truck


Input: Consider Input: Category: geographical property 
Words: horizontal, hotel, flat, lined, smooth

Output: hotel


Input: Consider Input: Category: weather 
Words: cold, brisk, 70, cool, fair


Output: cool