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

Ex Output:
folder


Ex Input:
Category: emotional status 
Words: left, emotional state, sad, emotional upsets, down

Ex Output:
left


Ex Input:
Category: emotional status 
Words: kind, down, descending, emotional, ashamed

Ex Output:

descending