You should specify that you aren't including any of the tall grass prairie portion of the Great Plains. I wasted so much time trying to figure out why Iowa, Minnesota, nor Missouri would work.
No part of Armenia is north of the Caucasus Mountains. Georgia is considered Asian despite having a bit of territory in Europe, but 100% of Armenia is in Asia.
About the Euro countries: the UK left the European Union, Lithuania uses the Euro, and the Czech Republic is now officially known as Czechia.
About the landlocked countries: Armenia and Azerbaijan are also Asian and landlocked.