Task: Program Execution
Input (English): 5, ['9321', '2671', 'Y', 'E', 'L', '4681', 't', 'x', '1043', 'n', '9837', '1049', '5833', 'p', '7007', 'b', '2643', 'e']
Output (English): 9321, 4681, 9837, b