private int tr_19(char ch)
    {
        if(cheq(ch,'t')) return 24;
        if(chin(ch,' ','9')) return 57;
        if(chin(ch,'\t','\n')) return 57;
        if(chin(ch,'u','~')) return 57;
        if(chin(ch,';','s')) return 57;
        return 0;
    }