B3311331313231311331322331333132313331323133313233313133313232211322331   >>    B331133131323131133132233133313231333132313331323331313331323221132233   <<    B3311331313231311331322331333132313331323133313233313133313232211322333   >>      B3311331313231311331322331333132313331323133313233313133313232211322332   >>