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: animal 
Words: goat, stingray, tiger, hike, fish

Answer: hike


Question: Category: chocolate food 
Words: brownie, cake, fudge, banned, molasses

Answer: banned


Question: Category: secretary duty 
Words: format, errands, order office supplies, answer, file

Answer:
format