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, earth, water, blaze, recruit

Output: recruit


Input: Consider Input: Category: weather 
Words: tangle, ghostly, fair, raining, sunny

Output: ghostly


Input: Consider Input: Category: measurement unit 
Words: foot, kilometer, ounce, yard, ankle


Output: ankle