Task: Program Execution
Input (English): 5, 20, ['7269', '9781', '4273', '3427', '1357', 'W', 'u', '2959', '4137', 'V', 'T', '4221', 'X', 'L', '5765', 'B', 'c', '7231', '7957', '3421', 'l', 'E', '5199', '4597', 'U', 'O', '4387']
Output (English): 124375971327cB5675LX1224TV73149592uW7531