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: secretary duty 
Words: correspondence, schedule, answer calls, keys, file

Output: keys


Input: Consider Input: Category: aesthetic characteristic 
Words: flaxen, just, texture, fair, level


Output: just