B3311331313231311331322331333132333133313223331211111333132212121   >>    B331133131323131133132233133313233313331322333121111133313221212   <<    B3311331313231311331322331333132333133313223331211111333132212123   >>      B3311331313231311331322331333132333133313223331211111333132212122   >>