Your code looks a bit off. Check the Hint if you need help! Your code threw the following error: 'int' object has no attribute 'append
It would square the numbers.
Replace this line with your code. start_list = [5, 3, 1, 2, 4] square_list =  # Your code here! for start_list in start_list: start_list.append(x ** 2) start_list.sort() print square_list