Task: Program Execution
Input (English): 4, 17, ['x', 'W', '779', '2407', '3985', '7501', 'f', '337', '1509', 'P', 'B', '2945', 'J', '6517', '3723', 'H', 'v', '5363', '9681']
Output (English): 240739857501f3371509PB2945J65173723Hv