Pair a country??

Mahjong is all about pairing 2 tiles, you have to pair the outer ones to pair the inner ones. Sometimes you pair the inner ones with the outer ones, to pair the middle ones.
We just had a ''international day'' at my school, every country in the school was represented, and so was every flag. If you looked at those flags you would see how some resembled each other, China and Turkey, Denmark and Sweden - just to mention a few. So what would the world look like if you paired all the countries in the world, with another country with a matching flag. What would the world look like?? imagine if Turkey and China became one country?? Denmark and Sweden are much alike, but Turkey and China? They do not seem alike to me, also there is the religious part of it.. USA and Afghanistan?

Just match the world, like a game of mahjong