deb      http://ftp.de.debian.org./debian             bullseye                  main contrib non-free
deb      http://ftp.de.debian.org./debian             bullseye-updates          main contrib non-free
deb      http://ftp.de.debian.org./debian             bullseye-proposed-updates main contrib non-free
deb      http://security.debian.org./debian-security  bullseye-security         main contrib non-free
deb      http://ftp.de.debian.org./debian             bullseye-backports        main contrib non-free
# deb      http://ftp.de.debian.org./debian             bullseye-backports-sloppy main contrib non-free