Draw a circuit with at most 3 gates that takes in 8 inputs b7, b6, b5, ..., b0 corresponding to a characters ASCII code, and outputs the binary integer b'7, b'6, b'5, ... b'0 corresponding to its numeric value if the input is the ASCII code for one of the digits '0' to '9'. Your circuit can do anything it likes if the input is not the ASCII code for one of the digits.