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