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: weather 
Words: tangle, ghostly, fair, raining, sunny

Ex Output:
ghostly


Ex Input:
Category: secretary duty 
Words: folder, support, order office supplies, correspondence, file

Ex Output:
folder


Ex Input:
Category: personal characteristic 
Words: positive, calm, classy, cool, scorching

Ex Output:

scorching