B3311331313231311331322331333132313231333131323223313232213331323132333221   >>    B331133131323131133132233133313231323133313132322331323221333132313233322   <<    B3311331313231311331322331333132313231333131323223313232213331323132333223   >>      B3311331313231311331322331333132313231333131323223313232213331323132333222   >>