public String weekTo(String field)
    {
         String newField = " TO ";

         if(field.length() == 3)
         {
              if(field.equals("SUN") || field.equals("MON") || field.equals("TUE")
                          || field.equals("WED") || field.equals("THU") || field.equals("FRI")
                           || field.equals("SAT"))
             {
                newField = newField + String.valueOf(getWeek(field));
             }
         }
         else
         {
             newField = "~invalid~";
         }

         return newField;
     }