Task: Program Execution
Input (English): 5, 7, ['619', 'Q', 'n', '999', 'M', 'Z', 'Y', '1331', '9181', 'L', 'b', '2441', 'U', '169', 'x', '6957', '2869', 'a', '9755', '237', 'c', 'R', '3789', 'U', '3217', 'k', '5919']
Output (English): M, 2441, 9755, k