private int tr_131(char ch)
    {
        if(chin(ch,'!','#')) return 131;
        if(chin(ch,'A',']')) return 131;
        if(chin(ch,'\t','\n')) return 90;
        if(cheq(ch,'^')) return 90;
        if(chin(ch,'%','?')) return 131;
        if(cheq(ch,'@')) return 9;
        if(cheq(ch,'$')) return 90;
        if(cheq(ch,' ')) return 90;
        if(chin(ch,'_','~')) return 131;
        return 0;
    }