B3311331313231311331322331333132313331323131323223313232211312122311   >>    B331133131323131133132233133313231333132313132322331323221131212231   <<    B3311331313231311331322331333132313331323131323223313232211312122313   >>      B3311331313231311331322331333132313331323131323223313232211312122312   >>