Natural rule if item popular

qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi qi