C13112133313331323321333133313331333133313331333133313331312111112111133233111   >>    C1311213331333132332133313331333133313331333133313331333131211111211113323311   <<    C13112133313331323321333133313331333133313331333133313331312111112111133233113   >>      C13112133313331323321333133313331333133313331333133313331312111112111133233112   >>