B3311331313231311331322331333132313231323331333131133132322331311332212121   >>    B331133131323131133132233133313231323132333133313113313232233131133221212   <<    B3311331313231311331322331333132313231323331333131133132322331311332212123   >>      B3311331313231311331322331333132313231323331333131133132322331311332212122   >>