private int tr_173(char ch)
    {
        if(cheq(ch,'s')) return 182;
        if(chin(ch,' ','9')) return 57;
        if(chin(ch,'t','~')) return 57;
        if(chin(ch,'\t','\n')) return 57;
        if(chin(ch,';','r')) return 57;
        return 0;
    }