None, Vienna is a city not a country.
The two countries that border both Switzerland and Germany are France and Austria.
they have common sea
Austria, Czechoslovakia, and Poland
Austria
There are two countries that border both Switzerland and Germany: Austria and France.
The three countries are German, Austria and Switzerland.
Switzerland and Austria
Austria, Czechoslovakia, and Poland
Austria, Germany, Poland, Slovakia
Austria and Switzerland
Switzerland, Austria, Slovenia and France
5 countries border Switzerland: France, Germany, Austria, Liechtenstein and Italy. Every other country in the world does not border Switzerland.