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: animal 
Words: pounce, fly, swim, walk, walk

Ex Output:
walk


Ex Input:
Category: poker 
Words: board, cards, dock, joker, deck

Ex Output:

dock