Open two files, one for read and one for write. Read the first file line by line. If the line begins with 'A', 'B', or 'C', write a line of "1" to the second file. If the line begins with 'X', 'Y', or 'Z', write a line of "2" to the second file. Otherwise write a line of "0" to the second file. For example, if the first file is: Computer Is  Your Best Friend   The second file should be: 1 0 2 1 0

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