B3311331313231311331322331333132313233313232233133313331312323211   >>    B331133131323131133132233133313231323331323223313331333131232321   <<    B3311331313231311331322331333132313233313232233133313331312323213   >>      B3311331313231311331322331333132313233313232233133313331312323212   >>