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: outdoor sport activity 
Words: wrestle, fish, iguana, hiking, hunt

Ex Output:
iguana


Ex Input:
Category: police punishment 
Words: suspension, exquisite, prime, fine, flyaway

Ex Output:
exquisite


Ex Input:
Category: bird 
Words: tackle, heron, windlass, crane, neck

Ex Output:

windlass