m = [1, 2, 3]
n = [4, 5, 6]
Add your code here!
return x + y
print join_lists(m, n)
You want this to print [1, 2, 3, 4, 5, 6]
I would like to ask why we do need to have built in function join_lists in this exercise instead print n + m directly.
Replace this line with your code.