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: animal 
Words: jump, drive, fly, eagle, beetle
Example Output: drive

Example Input: Category: physical property 
Words: fat, angular momentum, ugly, capacitance, fiber
Example Output: fiber

Example Input: Category: moral characteristic 
Words: equitable, impartial, fair, endure, decent
Example Output:
endure