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: personal characteristic 
Words: assured, refreshing, unruffled, cool, positive
Example Output: refreshing

Example Input: Category: widespread 
Words: boring, common, soldier, general, average
Example Output: soldier

Example Input: Category: elements 
Words: burn, scold, heat, fire, water
Example Output:
scold