B3311331313231311331322331333132333133313223331211331333133311211312231   >>    B331133131323131133132233133313233313331322333121133133313331121131223   <<    B3311331313231311331322331333132333133313223331211331333133311211312233   >>      B3311331313231311331322331333132333133313223331211331333133311211312232   >>