Task: Program Execution
Input (English): 12, 17, ['783', '7993', '813', 'R', '207', '5393', 'l', '3735', '7263', 'f', 'U', 'A', 'J', '327', 'L', '2103', 'U', 'P']
Output (English): A, J, 327, L, 2103, U