class ConcreteSuper {
  int extendedConcreteField = 0;
  abstract int extendedAbstractField;
  int declaredConcreteExtendsConcreteField = 0;
  int declaredAbstractExtendsConcreteField = 0;
  abstract int declaredConcreteExtendsAbstractField;
  abstract int declaredAbstractExtendsAbstractField;
}

class ConcreteClass extends ConcreteSuper {
  int declaredConcreteField = 0;
  abstract int declaredAbstractField;
  int declaredConcreteExtendsConcreteField = 0;
  abstract int declaredAbstractExtendsConcreteField;
  int declaredConcreteExtendsAbstractField = 0;
  abstract int declaredAbstractExtendsAbstractField;
}

main() {}