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: chocolate food 
Words: fudge, cream, replace, cookies, brownies

Answer: replace


Question: Category: moral characteristic 
Words: frank, concise, bun, matter of fact, fortitude

Answer: bun


Question: Category: secretary duty 
Words: reception, type, motherboard, errands, file

Answer:
motherboard