B3311331313231311331322331333131133132313133313232233131333132313211   >>    B331133131323131133132233133313113313231313331323223313133313231321   <<    B3311331313231311331322331333131133132313133313232233131333132313213   >>      B3311331313231311331322331333131133132313133313232233131333132313212   >>