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

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

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