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deb http://mirror.yandex.ru/debian bullseye main
deb-src http://mirror.yandex.ru/debian bullseye main

deb http://mirror.yandex.ru/debian bullseye-updates main
deb-src http://mirror.yandex.ru/debian bullseye-updates main

deb http://security.debian.org/ bullseye-security main
deb-src http://security.debian.org/ bullseye-security main

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