Task: Program Execution
Input (English): 4, 6, ['7487', 'S', 'a', '3685', '1441', '6819', '3999', '2951', '2807', '5761', 'd', '5833', '6593', '8655', 'X', 'N', 'f', '1531', 'D', 'l']
Output (English): 3685, 5761, N