# six nodes, and one edge with a bend

 [ Oranienburg ] -> [ Henningsdorf ]
 [ Oranienburg ] -> [ Herzberg ]
 [ Henningsdorf ] -> [ Strausberg ]
 [ Strausberg ] -> [ Herzberg ]
 [ Strausberg ] -> [ Neuruppin ]
 [ Oranienburg ] -> [ Potsdam ]
 [ Neuruppin ] -> [ Herzberg ]