C13112133313331323321333133313331333133313331311331333121111123231221   >>    C1311213331333132332133313331333133313331333131133133312111112323122   <<    C13112133313331323321333133313331333133313331311331333121111123231223   >>      C13112133313331323321333133313331333133313331311331333121111123231222   >>