private void setupNoRandPartB() throws IOException {
        if (this.su_ch2 != this.su_chPrev) {
            this.su_count = 1;
            setupNoRandPartA();
        } else if (++this.su_count >= 4) {
            this.su_z = (char) (this.data.ll8[this.su_tPos] & 0xff);
            this.su_tPos = this.data.tt[this.su_tPos];
            this.su_j2 = 0;
            setupNoRandPartC();
        } else {
            setupNoRandPartA();
        }
    }