Traceback (most recent call last):
 File "formatter_example.py", line 85, in blank_lines
     79 | def blank_lines():
     80 |     a = [1, 2, 3]
     81 | 
     82 |     length = len(a)
     83 | 
     84 | 
     85 |     return a[length]
                     ^^^^^^^^^
IndexError: list index out of range
