Task: Program Execution
Input (English): 2, 20, ['4149', 'y', 'S', 'Z', '4189', 'v', 'w', 'a', '729', '7891', 'G', 'B', 'f', 'i', '491', '4393', 'U', 'V', 'h', 'A', '5889', '4601', '5263']
Output (English): ySZ4189vwa7297891GBfi4914393UVhA