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.

Example Input: Category: weather 
Words: 70, endure, decent, cold, fair
Example Output: decent

Example Input: Category: poker 
Words: punch, pack, deck, check, fold
Example Output: punch

Example Input: Category: personal characteristic 
Words: cool, ethical, persistent, cold, assured
Example Output:
cold