Task: Program Execution
Input (English): 3, ['2517', 'M', '1591', '2899', '3551', 'O', '5275', '2771', '4373', 'O', '9943', 'B', 'r', 'i', '3901', '4799']
Output (English): 2517, 2899, 5275, O, r, 4799