Task: Program Execution
Input (English): 5, 5, ['A', '2389', '1831', 'B', '4585', '5341', '8459', 'C', 'A', 'u', '7693', 'B', 'o', '5993', '471', 'z', 'L', 'S', 'y', '3771', '4397', '9841']
Output (English): 4585