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: computers 
Words: download, file, order office supplies, document, motherboard

Ex Output:
order office supplies


Ex Input:
Category: construction 
Words: hoist, tackle, digger, excavator, crane

Ex Output:
tackle


Ex Input:
Category: ocean 
Words: current, wave, drink, blue, history

Ex Output:

history