C13112133313331323321333133313331333133313331333133313331312111112111112212121   >>    C1311213331333132332133313331333133313331333133313331333131211111211111221212   <<    C13112133313331323321333133313331333133313331333133313331312111112111112212123   >>      C13112133313331323321333133313331333133313331333133313331312111112111112212122   >>