Task: Program Execution
Input (English): 5, ['4869', 'X', 'r', 'j', 'I', 'C', 'h', 'l', '6819', 'M', '9343', '1509', 'F', 'J', '5153', '6551', '9407', '1639', 'L']
Output (English): 4869, C, 9343, 6551