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: corporate 
Words: solid, sustainability, streamline, firm, private
Example Output: solid

Example Input: Category: poker 
Words: deck, pack, gunwale, check, call
Example Output:
gunwale