import  java.io.Serializable;

 public   class  MessageStatus  implements  Serializable
{
     private   final  String myName;

     public   static   final  MessageStatus EMPTY =  new  MessageStatus ( "" );
     public   static   final  MessageStatus WAIT_REPLY =  new  MessageStatus ( "Ожидает ответа" );
     public   static   final  MessageStatus ACCEPTED =  new  MessageStatus ( "Принято" );
     public   static   final  MessageStatus DECLINED =  new  MessageStatus ( "Отклонено" );

     private  MessageStatus ( String name )
    {
        myName = name;
    }

     public  String toString ()
    {
         return  myName;
    }

}

 public   class  Rating  implements  Serializable {

     private  String name;

     public   static   final  Rating EXCELLENT =  new  Rating("Excellent");
     public   static   final  Rating OK =  new  Rating("OK");
     public   static   final  Rating LOW =  new  Rating("Low");
     private   static   final  Map INSTANCES =  new  HashMap();

     static  {
        INSTANCES.put(EXCELLENT.toString(), EXCELLENT);
        INSTANCES.put(OK.toString(), OK);
        INSTANCES.put(LOW.toString(), LOW);
    }

     private  Rating(String name) {
         this .name=name;
    }

     public  String toString() {
         return  name;
    }

     private  Object readResolve() {
         return  getInstance(name);
    }

     public   static  Rating getInstance(String name) {
         return  (Rating)INSTANCES.get(name);
    }
}