B3311331313231311331322331333132313133313113313113313232233131133112121   >>    B331133131323131133132233133313231313331311331311331323223313113311212   <<    B3311331313231311331322331333132313133313113313113313232233131133112123   >>      B3311331313231311331322331333132313133313113313113313232233131133112122   >>