B3311331313231311331322331333132313232213232211233132313231311311   >>    B331133131323131133132233133313231323221323221123313231323131131   <<    B3311331313231311331322331333132313232213232211233132313231311313   >>      B3311331313231311331322331333132313232213232211233132313231311312   >>