public String Wert2String() {
      if ((wert>=2)&&(wert<=10))
         return ""+wert;

      switch (wert) {
         case 1:
            return "A";
         case 11:
            return "B";
         case 12:
            return "D";
         case 13:
            return "K";
        }
      return "-1";
   }