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: corporate 
Words: leverage, solid, firm, amalgamated, concerted
Example Output: solid

Example Input: Category: weather 
Words: brisk, ghostly, windy, fair, deal
Example Output: ghostly

Example Input: Category: aesthetic characteristic 
Words: handsome, fine, happy, beautiful, dull
Example Output:
happy