Task: Program Execution
Input (English): 7, 10, ['3633', 'B', '6697', '1967', '5649', '2739', '6139', '7423', '1731', 'P', '6993', '9665', 'l', 'n', 'h', 't', 'A', '1919', 'X', '9987', '2401', '1965']
Output (English): 613974231731P