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: aesthetic characteristic 
Words: prison, fine, there, handsome, high quality

Ex Output:
prison


Ex Input:
Category: weather 
Words: windy, stormy, fair, tone, tangle

Ex Output:
tone


Ex Input:
Category: animal 
Words: fly, flap, bats, bee, jump

Ex Output:

flap