Task: Program Execution
Input (English): 4, ['9067', '7997', '5717', 'X', '7643', 'B', 'w', '3225', 'F', 'U', '2243', 'P', 'D', 'c', '6509', '1903', '1849', '3915', '1013', '2423']
Output (English): 9067, 7997, 5717, X