Task: Program Execution
Input (English): 4, 13, ['v', '721', '1631', '5171', '8613', 'a', 'C', '4493', 'A', '5909', 'Z', 'u', 'X', '5569', '4777', '5135', '8257', '7001', 'R', 's']
Output (English): XuZ9095A3944Ca31681715