Task: Program Execution
Input (English): 5, 9, ['P', '6211', '4121', '6299', 'd', 'R', 'x', '9939', 'O', '4003', 'M', '7517', '7945', 'D', 'W', '2613', 'T', 'R', '1835', 'A', '8459', '5465', 'Y', '8167', 'O', 'U', '3651']
Output (English): d, D, Y