deb http://http.us.debian.org/debian stretch main
deb-src http://http.us.debian.org/debian stretch main

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

deb http://http.us.debian.org/debian stretch-updates main
deb-src http://http.us.debian.org/debian stretch-updates main

deb http://http.debian.net/debian stretch-backports main
deb-src http://http.debian.net/debian stretch-backports main