Task: Program Execution
Input (English): 19, 21, ['P', 'X', '1441', 'Q', '1083', '2623', '3883', 'H', '6997', '6115', '2401', 'm', '4783', 'w', '8231', '419', 'v', 'p', '6451', 'd', 'O', 'y', '5219', '9559']
Output (English): Od6451