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: pay, cool, combustion, air, fire

Output: pay


Input: Consider Input: Category: emotional display 
Words: follow, doe, suppressed, culture, fawn

Output: doe


Input: Consider Input: Category: widespread 
Words: general, boring, soldier, ubiquitous, average


Output: soldier