B3311331313231311331322331333132313331322132333133313231323132313221311311   >>    B331133131323131133132233133313231333132213233313331323132313231322131131   <<    B3311331313231311331322331333132313331322132333133313231323132313221311313   >>      B3311331313231311331322331333132313331322132333133313231323132313221311312   >>