What is the contrapositive of the following implication? If every hat is red, then I will wear a scarf. If I don't wear a scarf, then no hat is red. If I wear a scarf, then every hat is green. If at least one hat is not red, then I will not wear a scarf. If no hat is red, then I will not wear a scarf. If I wear a scarf, then every hat is red. If I don't wear a scarf, then at least one hat is not red.

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