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: summer, roll, plummet, fall, exercise

Answer: summer


Question: closest, finished for the day, bordering, nearest, close

Answer: finished for the day


Question: relaxed, fine, comfortable, well, dull

Answer:
dull