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: military rank 
Words: general, fighter, normal, major, lieutenant
Example Output: normal

Example Input: Category: animal 
Words: swim, dive, fly, car, bee
Example Output: car

Example Input: Category: fried food 
Words: fritter, dunker, patty, waste, danish
Example Output:
waste