C13112133313331323321333133313331333133313331333133313331312111112111111213121   >>    C1311213331333132332133313331333133313331333133313331333131211111211111121312   <<    C13112133313331323321333133313331333133313331333133313331312111112111111213123   >>      C13112133313331323321333133313331333133313331333133313331312111112111111213122   >>