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: invent, unlicensed, brownies, lie, fudge

Answer: brownies


Question: prime, penalty, fine, mad, arrest

Answer: mad


Question: bat, fish, hamster, dog, hike

Answer:
hike