Task: Program Execution
Input (English): 6, 12, ['773', '8285', '3537', '8429', 'H', 'D', 'X', '5405', '7959', 'J', 'r', '8045', '7171', 'x', 'H', '9105', 'G', 'q', '8999', 'n', 'M', '3059', '1665', '149', 'Q', 'P', 'U', 'U']
Output (English): DX54057959Jr8045