Typo in Part 5: Dictionary

[tnmyd]

In the first paragraph, now[emphasized below] should be know.

Lists can be handy in many situations, but they are limited by the fact that the items are accessed through indexes; 0, 1, 2, and so forth. If you want to find some item in a list, you will either have to now its index, or, at worst, traverse through the entire list.