Task: Program Execution
Input (English): 15, 16, ['7861', 'T', 'x', '1885', 'B', 'c', '2131', 'O', 'E', '2169', '6591', '5197', '3905', '321', '4823', 'W', 'K', '173', 's', 'M', '3101', '4257', '5235', '6383', '7523', 'K', 'R', 'P']
Output (English): W4823