Given a set of five words, generate the word from the set that does not belong (i.e. is the least relevant) with the other words. Words are separated by commas.

Input: Consider Input: fire, cool, water, ban, ice

Output: ban


Input: Consider Input: deal, fair, endure, windy, ghostly

Output: ghostly


Input: Consider Input: elephant, duck, sprint, dog, lion


Output: sprint