All Countries that have a Coastline on the Atlantic
Not counting countries that only have overseas territories on/ in the atlantic (such as sint marten for the netherlands, greenland/faroe islands for denmark, etc...)
Yes, I forgot Cape Verde, thanks for pointing that out. I'd say that Denmark only borders the North Sea, not the direct Atlantic. Similarly, Central America, Mexico, and Colombia only border the Caribbean Sea, not the direct Atlantic.
Standard type ins should be accepted. USA and UK. Also tried Congo, Republic of Congo, Republic of the Congo...and all other permutations. None worked.