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 display 
Words: pester, fawn, suppressed, follow, woods

Ex Output:
woods


Ex Input:
Category: emotional status 
Words: sad, remorseful, down, ashamed, sliding

Ex Output:
sliding


Ex Input:
Category: animal 
Words: fly, swim, flap, run, dive

Ex Output:

flap