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: aesthetic characteristic 
Words: luke, fair, variety, tone, well

Answer: luke


Question: Category: moral characteristic 
Words: just, make the grade, well, unjust, fair

Answer: make the grade


Question: Category: physical property 
Words: chunky, heavy, fat, area, sugar

Answer:
sugar