B3311331313231311331322331333132333133313223331211331333133313231232333231   >>    B331133131323131133132233133313233313331322333121133133313331323123233323   <<    B3311331313231311331322331333132333133313223331211331333133313231232333233   >>      B3311331313231311331322331333132333133313223331211331333133313231232333232   >>