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: temperature 
Words: cold, cool, icy, assured, mild

Ex Output:
assured


Ex Input:
Category: physical activity 
Words: bend, duck, goose, jog, crouch

Ex Output:
goose


Ex Input:
Category: social gathering 
Words: picnic, club, meeting, cinema, grilled cheese

Ex Output:

grilled cheese