class Interface1 {
  void implementMultipleMethod() {}
  void declareConcreteImplementMultipleMethod() {}
  void declareAbstractImplementMultipleMethod() {}
}

class Interface2 {
  void implementMultipleMethod() {}
  void declareConcreteImplementMultipleMethod() {}
  void declareAbstractImplementMultipleMethod() {}
}

class ConcreteClass implements Interface1, Interface2 {
  void declareConcreteImplementMultipleMethod() {}
  void declareAbstractImplementMultipleMethod();
}

abstract class AbstractClass implements Interface1, Interface2 {
  void declareConcreteImplementMultipleMethod() {}
  void declareAbstractImplementMultipleMethod();
}

class ConcreteSub extends AbstractClass {}

main() {}