B3311331313231311331322331333132313331322331323133313232213233311211   >>    B331133131323131133132233133313231333132233132313331323221323331121   <<    B3311331313231311331322331333132313331322331323133313232213233311213   >>      B3311331313231311331322331333132313331322331323133313232213233311212   >>