Task: Program Execution
Input (English): 16, 21, ['e', '5725', 'B', '8981', 'P', '4437', '4419', 'w', 's', 'W', '6475', '7247', '4903', 'd', '3711', '1181', 'C', 'i', 'x', 'W', 'X', '349', 'a', '7347', 'y', '951', 'J', '1591']
Output (English): XWxiC1811