Task: Program Execution
Input (English): 4, 7, ['4917', '3049', 'M', 'o', 'U', 'c', '2143', '5453', 'L', 'X', 'v', '2887', 'p', 'o', 'G', '9029', 'z', 'U', '3965', '6155', 'A', '2317', 'N']
Output (English): oUc2143