1 deb http://deb.debian.org/debian bookworm main contrib non-free
2 deb http://security.debian.org/debian-security bookworm-security main contrib non-free
3 deb http://deb.debian.org/debian bookworm-updates main contrib non-free
4 deb http://ftp.debian.org/debian bookworm-backports main contrib non-free