abstract class Interface {
  int get implementedConcreteGetter => 0;
  int get implementedAbstractGetter;
  int get declaredConcreteImplementsConcreteGetter => 0;
  int get declaredAbstractImplementsConcreteGetter => 0;
  int get declaredConcreteImplementsAbstractGetter;
  int get declaredAbstractImplementsAbstractGetter;
}

abstract class AbstractClass implements Interface {
  int get declaredConcreteGetter => 0;
  int get declaredAbstractGetter;
  int get declaredConcreteImplementsConcreteGetter => 0;
  int get declaredAbstractImplementsConcreteGetter;
  int get declaredConcreteImplementsAbstractGetter => 0;
  int get declaredAbstractImplementsAbstractGetter;
}

main() {}