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: emotional status 
Words: nervous, frustrated, fret, jack, concerned

Ex Output:
jack


Ex Input:
Category: location (proximity) 
Words: neighboring, right there, shut down, close, bordering

Ex Output:
shut down


Ex Input:
Category: secretary duty 
Words: order office supplies, file, type, sort mail, folder

Ex Output:

folder