Task: Program Execution
Input (English): 19, 21, ['279', 'w', 'o', '5123', 'J', 'L', '4449', '7755', '9613', 'r', '111', 'm', '1069', '9123', 'U', '6865', '8199', '8123', '7689', 'M', 'D', 'd', 'r', 'l']
Output (English): 7689