@2×4:
Polska, Česká republika, Slovensko, Magyarország, România, България, Eesti, Lietuva, Latvija, Україна, საქართველო… maybe Slovenija

Good Lord, what a beautiful string of shining pearls!

I’d wish for participation by Turkey, Albania, [we don't dare mention Kosovo], and Azerbaijan in our hoped-for Black Sea dream-team, leading ultimately to a trans-Turkic (with breaks) trade route from Gallipoli (“Gelibolu”) to Urumqi, and thence to WuWei, Lanzhow and X’ian.

You know, the Silk Road.