Task: Program Execution
Input (English): 7, ['4865', 'n', 'f', '5831', 'M', '717', 'c', '391', 'B', '1437', '6517', '3991', '1353', '5879', 'D', 'N', 'L', 'T', 'F', 'c', '2869', 'B', '1701', '1583', '9953']
Output (English): 4865, 391, D, B