B3311331313231311331322331333132313113313131133133313232233132213121   >>    B331133131323131133132233133313231311331313113313331323223313221312   <<    B3311331313231311331322331333132313113313131133133313232233132213123   >>      B3311331313231311331322331333132313113313131133133313232233132213122   >>