I'm not sure what this question wants...help!

I really don't understand what's wrong with my answer, maybe I don't understand what the question wants. I'm reading it as: "making a list (my_list) with 3 numbers and 2 strings, then add to it a second list containing any 2 items." But when I try to put that in, as at the time of my answer, it tells me that the final version of my_list must have 6 items, not 7. I think to myself "that makes no sense" but I alter the added list so my_list will have 6 items. Now it tells me I don't have enough! I really don't get it, my code is adding lists together, I can see in the preview items get added to my list. I feel like there must be something really simple I'm overlooking.

my_list = [1,2,3,'four','five'];
other_list = [4,'six'];
my_list.extend(other_list);