Task: Program Execution
Input (English): 21, 25, ['a', '517', 'A', '1411', 'z', 'l', 'M', '1663', 'm', '1125', '5843', 'H', 'K', 'y', '2549', 'h', 'o', 'e', '1711', 'M', '4827', '6803', '9943', 'X', '3833']
Output (English): 3383X349930867284