Task: Program Execution
Input (English): 16, 18, ['M', 'x', '5561', 'j', '669', '7157', 'B', '8443', '6343', '7339', '903', '1711', '5517', 'X', 'Z', 'W', 'D', '8649', 'c', '359', '9155', 'Q', 'P', '8157']
Output (English): W, D, 8649