Task: Program Execution
Input (English): 4, ['6789', '787', 't', '7725', 'a', '5979', '2417', 'x', '1103', '1929', 'K', 'J', '6169', 'n', 'L', '2695', 'e', 'C']
Output (English): 6789, a, 1103, 6169, e