deb http://ftp.surfnet.nl/os/Linux/distr/debian/ testing main non-free contrib
deb-src http://ftp.surfnet.nl/os/Linux/distr/debian/ testing main non-free contrib
deb http://http.us.debian.org/debian/ sid main contrib non-free
deb http://security.debian.org/ testing/updates main contrib non-free
deb-src http://security.debian.org/ testing/updates main contrib non-free
deb http://ftp.surfnet.nl/os/Linux/distr/debian/ experimental main non-free contrib
deb-src http://ftp.surfnet.nl/os/Linux/distr/debian/ experimental main non-free contrib