Question: Please implement an operator/function in Scheme that recognizes the language defined by the grammar. The function should return a list of characters for a valid

Please implement an operator/function in Scheme that recognizes the language defined by the grammar. The function should return a list of characters for a valid string, otherwise it displays an error message. You may define additional helper functions. Please use the attached .rkt file for your implementation. A function for checking whether you reach the end of the input string is provided

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