B3311331313231311331322331333132333131333132233133313232233132313123231311   >>    B331133131323131133132233133313233313133313223313331323223313231312323131   <<    B3311331313231311331322331333132333131333132233133313232233132313123231313   >>      B3311331313231311331322331333132333131333132233133313232233132313123231312   >>