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: body part 
Words: foot, knee, eye, leg, ounce

Answer: ounce


Question: Category: boxing terminology 
Words: corner, fold, deck, knockout, level

Answer: fold


Question: Category: card games 
Words: war, brandy, bridge, gin, blackjack

Answer:
brandy