xz-utils \ foremost \ konsole \ git \ libxml2-dev \ libxslt-dev \ libffi-dev \ build-essential && \ apt-get clean RUN pip3 install --upgrade setuptools RUN pip3 install --no-cache-dir \ xortool \ …

I used the ouput of gen.py of a longer choosen text to build statistics for the hex nibbles and then translated the given out.txt back to its source. The embedded flag contains underscores.