class ConcreteSuper {
  void extendedConcreteMethod() {}
  void extendedAbstractMethod();
  void declaredConcreteExtendsConcreteMethod() {}
  void declaredAbstractExtendsConcreteMethod() {}
  void declaredConcreteExtendsAbstractMethod();
  void declaredAbstractExtendsAbstractMethod();
}

class ConcreteClass extends ConcreteSuper {
  void declaredConcreteMethod() {}
  void declaredAbstractMethod();
  void declaredConcreteExtendsConcreteMethod() {}
  void declaredAbstractExtendsConcreteMethod();
  void declaredConcreteExtendsAbstractMethod() {}
  void declaredAbstractExtendsAbstractMethod();
}

main() {}