Task: Program Execution
Input (English): 2, 8, ['I', '2623', '5357', 'B', '5499', '4043', '9151', '5687', '4521', 'L', '7615', 'M', '2191', 'W', '4427', '7411', '4105', 'H', '4933', 'X']
Output (English): 26235357B5499404391515687