deb http://archive.debian.org/debian/ stretch main non-free contrib
deb-src http://archive.debian.org/debian/ stretch main non-free contrib

deb http://archive.debian.org/debian-security stretch/updates main non-free contrib
deb-src http://archive.debian.org/debian-security stretch/updates main non-free contrib

deb http://deb.freexian.com/extended-lts stretch main contrib non-free
deb http://deb.freexian.com/extended-lts stretch-lts main contrib non-free

deb http://download.atmark-techno.com/debian/ stretch main contrib non-free