C312312111111331312111133133313331331121111331333133313232233133321123231   >>    C31231211111133131211113313331333133112111133133313331323223313332112323   <<    C312312111111331312111133133313331331121111331333133313232233133321123233   >>      C312312111111331312111133133313331331121111331333133313232233133321123232   >>