B3311331313231311331322331333132333132311211331333132322331311331311212121   >>    B331133131323131133132233133313233313231121133133313232233131133131121212   <<    B3311331313231311331322331333132333132311211331333132322331311331311212123   >>      B3311331313231311331322331333132333132311211331333132322331311331311212122   >>