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: fire, retire, ice, air, earth

Output: retire


Input: Consider Input: Category: direction 
Words: right, descending, down, opposite of up, emotional supports

Output: emotional supports


Input: Consider Input: Category: emotional status 
Words: nervous, fret, emotional upsets, frustrated, strap lock


Output: strap lock