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: elements 
Words: ice, air, fire, hire, combustion

Output: hire


Input: Consider Input: Category: aesthetic characteristic 
Words: level, fair, milky, sunny, well

Output: sunny


Input: Consider Input: Category: bird 
Words: excavator, swift, crane, hoist, winch


Output: excavator