C31231211113313112133313331311331333133313331333133313311213233311   >>    C3123121111331311213331333131133133313331333133313331331121323331   <<    C31231211113313112133313331311331333133313331333133313311213233313   >>      C31231211113313112133313331311331333133313331333133313311213233312   >>