B3311331313231311331322331333132313233313231333131323133313232212121   >>    B331133131323131133132233133313231323331323133313132313331323221212   <<    B3311331313231311331322331333132313233313231333131323133313232212123   >>      B3311331313231311331322331333132313233313231333131323133313232212122   >>