deb http://ftp.debian.org/debian stretch main contrib non-free
#deb-src http://ftp.debian.org/debian stretch main contrib non-free
deb http://ftp.debian.org/debian stretch-updates main contrib non-free
#deb-src http://ftp.debian.org/debian stretch-updates main contrib non-free
deb http://security.debian.org/debian-security stretch/updates main contrib non-free
#deb-src http://security.debian.org/debian-security stretch/updates main contrib non-free
deb http://ftp.debian.org/debian stretch-backports main contrib non-free
#deb-src http://ftp.debian.org/debian stretch-backporst main contrib non-free

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

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

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