B3311331313231311331322331333132313231323331333131333133313223311211313231   >>    B331133131323131133132233133313231323132333133313133313331322331121131323   <<    B3311331313231311331322331333132313231323331333131333133313223311211313233   >>      B3311331313231311331322331333132313231323331333131333133313223311211313232   >>