Task: Program Execution
Input (English): 6, 10, ['2669', 'p', 'O', 'u', '9431', 'M', 'J', 'f', 'Q', '8213', 'i', '45', '545', '631', 'K', 'L', 'L', '7873', 'Z', 'm']
Output (English): MJfQ8213