public String toString(){
    
    if(NetworkID == 0){
      String nullString = "0";
      return nullString;
    }
    if(((children.get(0).getChildren()==null) ) ) {
      
      return Global.chars[NetworkID];
    }
    
    else {
      
      String s1 = children.get(0).toString();
      String s2 = children.get(1).toString();
      
      String result = "["+s1+s2+"]";
      return result;
      
    }
    
    
  }