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.

Category: emotional status 
Words: content, hearing, fine, happy, alert
hearing

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

Category: physical activity 
Words: summer, trip, jump, fall, lift

summer