B3311331313231311331322331333132313232233131323112211232313231211   >>    B331133131323131133132233133313231323223313132311221123231323121   <<    B3311331313231311331322331333132313232233131323112211232313231213   >>      B3311331313231311331322331333132313232233131323112211232313231212   >>