B3311331313231311331322331333132322331322112331323132322331333132313311211231   >>    B331133131323131133132233133313232233132211233132313232233133313231331121123   <<    B3311331313231311331322331333132322331322112331323132322331333132313311211233   >>      B3311331313231311331322331333132322331322112331323132322331333132313311211232   >>