Task: Program Execution
Input (English): 7, 9, ['247', '3399', 'i', 'Y', '1847', '9523', 'c', 'J', '341', 'Z', '4753', 'r', '2073', 'I', '989', 'B', '6221', '2867', '6235', 'k', '591']
Output (English): cJ341