Using the starting country listed in the first box, find the nearest country starting with B, then the nearest country to the B country starting with C and so on and so on util you get to Z. There are no countries that start with W or X.
Macedonia has been a a battle with Greece over the name and the country eventually changed the name recently. https://www.cnn.com/2019/01/25/europe/macedonia-name-change-controversy-intl/index.html
Good quiz