B3311331313231311331322331333132322132322331323132322331333132313211231   >>    B331133131323131133132233133313232213232233132313232233133313231321123   <<    B3311331313231311331322331333132322132322331323132322331333132313211233   >>      B3311331313231311331322331333132322132322331323132322331333132313211232   >>