B3311331313231311331322331333131133132313133313232233131333132313231121211   >>    B331133131323131133132233133313113313231313331323223313133313231323112121   <<    B3311331313231311331322331333131133132313133313232233131333132313231121213   >>      B3311331313231311331322331333131133132313133313232233131333132313231121212   >>