B3311331313231311331322331333132313232233131311331333132313331322123132311   >>    B331133131323131133132233133313231323223313131133133313231333132212313231   <<    B3311331313231311331322331333132313232233131311331333132313331322123132313   >>      B3311331313231311331322331333132313232233131311331333132313331322123132312   >>