Task: Program Execution
Input (English): 18, 20, ['Q', '2423', 'c', 'U', 'o', '9369', 'c', '8805', 'q', '6445', '173', 'L', 'y', 'j', '1069', '3937', 'o', '1307', '8637', 'E', '3101', '385']
Output (English): 13078637E