Task: Program Execution
Input (English): 4, 20, ['963', 'f', '8387', '8169', '9431', '2091', 'a', '6439', '7853', 'y', '1069', 'y', '9285', 'A', 'o', '6829', 'h', 'J', '9759', '1015', 'q', '243', 'N']
Output (English): 51019579Jh9286oA5829y9601y35879346a190213499618