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: emotional status 
Words: left, emotional state, sad, emotional upsets, down

Answer: left


Question: Category: poker 
Words: fold, deck, board, call, knockout

Answer: knockout


Question: Category: aesthetic characteristic 
Words: hot, well, fine, neat, classy

Answer:
well