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: fudge, banned, brownie, unwarranted, fib

Answer: brownie


Question: fat, obese, iron, sugar, sugars

Answer: obese


Question: cub, fawn, kid, buck, pester

Answer:
pester