Task: Program Execution
Input (English): 16, 18, ['1389', 'w', '6889', 'r', '6403', '3613', 'U', '8999', '1501', '6799', '7033', 'r', '6183', 'N', '1933', 'U', 'O', '4217', '5519', '6269']
Output (English): 4217