Task: Program Execution
Input (English): 5, 13, ['3307', 'M', '4437', 'W', 'g', '9509', '6161', 'b', '4671', '9165', '641', '5619', 'B', 'f', 'L', 'W', 'E', 'J', '6903', '9963', '3693']
Output (English): B561964191654671b61619509g