Task: Program Execution
Input (English): 4, ['K', 'B', '4297', '629', '1045', '8353', '9993', 'q', '2949', 'k', '6545', '561', 'u', '6803', 'z', 'p', 'C', '9167']
Output (English): K, 1045, 2949, u, C