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: decent, impartial, light, fair, dishonest
Example Output: light

Example Input: Category: bird 
Words: crane, hoist, egret, tackle, ostrich
Example Output: hoist

Example Input: Category: physical activity 
Words: fall, jump, autumn, run, tumble
Example Output:
autumn