B3311331313231311331322331333132313231323331333131333133313233231323221111   >>    B331133131323131133132233133313231323132333133313133313331323323132322111   <<    B3311331313231311331322331333132313231323331333131333133313233231323221113   >>      B3311331313231311331322331333132313231323331333131333133313233231323221112   >>