Write a program using ASCII characters. Five alphanumeric (0-9, A-Z, a-z) characters will be inserted at random into your program's source code. Your task is to detect and output these characters inserted into your program.
- Your code cannot use any form of backup file.
- Your code may produce any unnecessary error messages, provided these are distinguishable from the actual output.
- The output may be on the screen or into a file.
- The output may also contain unnecessary characters, but no extra alphanumeric characters (excluding error messages).
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