I think it's Austria. As far as I remember the train Berlin <> Budapest passes through Vienna.
(I'm surprised, though, that the train would pass through five countries. AFAIK it doesn't pass through the Czech Republic.)
(I'm surprised, though, that the train would pass through five countries. AFAIK it doesn't pass through the Czech Republic.)
The only thing that changed a few years ago is Prague. Changed for SW Poland.