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: moral characteristic 
Words: fair, well, impartial, alright, stormy
Example Output: stormy

Example Input: Category: secretary duty 
Words: file, software, schedule, support, order office supplies
Example Output: software

Example Input: Category: secretary duty 
Words: order office supplies, support, answer calls, file, format
Example Output:
format