C131121333133313233213331333133313331312111133133313331333133313113313232222311   >>    C13112133313331323321333133313331333131211113313331333133313331311331323222231   <<    C131121333133313233213331333133313331312111133133313331333133313113313232222313   >>      C131121333133313233213331333133313331312111133133313331333133313113313232222312   >>