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: aesthetic characteristic 
Words: honorable, fair, variety, milky, even
Example Output: honorable

Example Input: Category: secretary duty 
Words: support, type, file, software, answer
Example Output: software

Example Input: Category: shady activities 
Words: pie, fib, fudge, unwarranted, invent
Example Output:
pie