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: temperature 
Words: cold, hot, cool, popular, relaxing

Output: popular


Input: Consider Input: Category: type of rigidity 
Words: inflexible, tough, taut, firm, leverage

Output: leverage


Input: Consider Input: Category: emotional status 
Words: relaxed, content, fine, suspension, mad


Output: suspension