Task: Program Execution
Input (English): 2, 16, ['U', 'y', 'Z', '7745', 'W', 'F', 'K', '4471', 'C', 'A', '8847', '6257', '9775', '1491', '7197', '1155']
Output (English): 551179171941577975267488AC1744KFW5477Zy