There are 6 mystery countries, one in each continent
Gray: No mystery countries have the same # of letters as this country
Yellow: A mystery country has the same # of letters as this country, but it's in the wrong continent
Green: A mystery country in this country's continent has the same # of letters as this country, but it's still not correct. Find another country that fits these criteria!
Dark Green: A mystery country in the correct continent with the right # of letters
Combine the 6 mystery countries' starting letters to get the final country and win. Only dark green countries are mystery countries this time!