Given a set of five words, generate the word from the set that does not belong (i.e. is the least relevant) with the other words. Words are separated by commas.
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Question: crew, board, deck, rudder, hull

Answer: board


Question: cool, fair, light, fine, level

Answer: fine


Question: harsh, frank, brash, matter of fact, wienerwurst

Answer:
wienerwurst