private String Change_POS(String str)
    {
        if(str.compareToIgnoreCase("Noun")==0)
            return "বিশেষ্য";
        else if(str.compareToIgnoreCase("Pronoun")==0)
            return "সর্বনাম";
        else if(str.compareToIgnoreCase("Adjective")==0)
            return "বিশেষন";
        else if(str.compareToIgnoreCase("Verb")==0)
            return "ক্রিয়া";
        else
            return "অব্যয়";
           
    }