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: employment activity 
Words: pay, instruct, heat, fire, scold

Ex Output:
heat


Ex Input:
Category: bird 
Words: crane, concrete pourer, goose, hoist, duck

Ex Output:
concrete pourer


Ex Input:
Category: employment activity 
Words: fire, blaze, scold, empower, ban

Ex Output:

blaze