Question: a function that takes a string as an input checks the letters of the input and returns a list that contains the characters in the

a function that takes a string as an input checks the letters of the input and returns a list that contains the characters in the string only once and in alphabetical order.

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a function that takes a string as an input checks the letters of the input and returns a list that contains the characters in the string only once and in alphabetical order.

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