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.
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Question: Category: mode of transportation 
Words: bee, swim, fly, car, walk

Answer: bee


Question: Category: computers 
Words: ram, file, prepare, keys, format

Answer: prepare


Question: Category: moral characteristic 
Words: fair, unjust, ok, balanced, variety

Answer:
variety