C13112133313331323321333133313331333133313331311331333121133113121   >>    C1311213331333132332133313331333133313331333131133133312113311312   <<    C13112133313331323321333133313331333133313331311331333121133113123   >>      C13112133313331323321333133313331333133313331311331333121133113122   >>