Task: Program Execution
Input (English): 1, 4, ['8739', '9107', '3143', '1005', 'u', '7483', '7435', 'a', '63', 'Z', 'a', 'a', 'E', '8883', '6445', '3499', 'X', '6991', 't', '9017', '4653', 'd', '215', '6435', '7077']
Output (English): 1005, 3143, 9107, 8739