Task: Program Execution
Input (English): 14, 18, ['Y', 'G', '689', '4107', 'j', '7397', 'L', 'M', 'Z', 'D', 'n', '4407', '3469', '3339', '2129', 'a', 'b', 'N', '487']
Output (English): 33392129abN