[ Berlin ] { offset: 0,2; origin: Bonn; }
[ Frankfurt ] { offset: 2,2; origin: Bonn; }
[ Ulm ] { offset: 2,0; origin: Bonn; }
[ Bonn ] --> [ Frankfurt ]
[ Berlin ] { offset: 0,2; origin: Bonn; }
[ Frankfurt ] { offset: 2,2; origin: Bonn; }
[ Ulm ] { offset: 2,0; origin: Bonn; }
[ Bonn ] --> [ Frankfurt ]