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.

Ex Input:
Category: physical activity 
Words: bend, winter, fall, climb, exercise

Ex Output:
winter


Ex Input:
Category: direction 
Words: down, lower, emotional upsets, below, falling

Ex Output:
emotional upsets


Ex Input:
Category: weather 
Words: endure, alright, make the grade, deal, fair

Ex Output:

alright