$ find /usr/lib -not -group root -ls
797531 28 -rwxr-sr-x 1 root mail 27176 Apr 25 2016 /usr/lib/emacs/24.5/x86_64-linux-gnu/movemail
791614 12 -rwxr-sr-x 1 root tty 10232 May 9 2016 /usr/lib/mc/cons.saver
659381 44 -rwsr-xr-- 1 root messagebus 42992 Oct 12 13:29 /usr/lib/dbus-1.0/dbus-daemon-launch-helper
921107 12 -rwxr-sr-x 1 root utmp 10232 Mar 11 2016 /usr/lib/x86_64-linux-gnu/utempter/utempter