<Tr> <Td> Berlin </Td> <Td> Berlin </Td> <Td> 892 </Td> <Td> 3,400,000 </Td> </Tr> <Tr> <Td> Brandenburg </Td> <Td> Potsdam </Td> <Td> 29,477 </Td> <Td> 2,568,000 </Td> </Tr> <Tr> <Td> Bremen </Td> <Td> Bremen </Td> <Td> 404 </Td> <Td> 663,000 </Td> </Tr> <Tr> <Td> Hamburg </Td> <Td> Hamburg </Td> <Td> 755 </Td> <Td> 1,735,000 </Td> </Tr>

With which of these countries does germany share the largest border