B3311331313231311331322331333132313133313113313113313232233132213231121   >>    B331133131323131133132233133313231313331311331311331323223313221323112   <<    B3311331313231311331322331333132313133313113313113313232233132213231123   >>      B3311331313231311331322331333132313133313113313113313232233132213231122   >>