Task: Program Execution
Input (English): 1, 5, ['6945', '6451', 'x', '5241', '2197', 'j', '9141', '2627', '6343', '9517', '735', 'L', 'F', '993', '8789', '6689', '8739']
Output (English): 6945, 6451, x, 5241, 2197