B3311331313231311331322331333132333132311211331333132322331323132323221   >>    B331133131323131133132233133313233313231121133133313232233132313232322   <<    B3311331313231311331322331333132333132311211331333132322331323132323223   >>      B3311331313231311331322331333132333132311211331333132322331323132323222   >>