Task: Program Execution
Input (English): 4, 13, ['D', '8679', 'd', 'l', 'N', 'Z', '221', 'b', '4023', 'U', 'W', 'C', 'f', '9805', 'U', 'v', 'y', 'U']
Output (English): lNZ221b4023UWCf