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: boats 
Words: lifeline, stern, fold, deck, rudder

Ex Output:
fold


Ex Input:
Category: computers 
Words: download, file, order office supplies, document, motherboard

Ex Output:
order office supplies


Ex Input:
Category: aesthetic characteristic 
Words: trustworthy, variety, tone, ghostly, fair

Ex Output:

trustworthy