private int tr_73(char ch)
    {
        if(chin(ch,'&','9')) return 190;
        if(cheq(ch,':')) return 10;
        if(cheq(ch,'%')) return 48;
        if(chin(ch,' ','$')) return 190;
        if(cheq(ch,'\n')) return 121;
        if(cheq(ch,'\t')) return 190;
        if(chin(ch,';','~')) return 190;
        return 0;
    }