B3311331313231311331322331333132333133313223331211331333133313231323213121   >>    B331133131323131133132233133313233313331322333121133133313331323132321312   <<    B3311331313231311331322331333132333133313223331211331333133313231323213123   >>      B3311331313231311331322331333132333133313223331211331333133313231323213122   >>