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: jail, probation, fine, classy, firstrate

Answer: classy


Question: danish, fried, lollygag, pastry, fritter

Answer: lollygag


Question: nervous, frustrated, fret, jack, concerned

Answer:
jack