C13112133313331323321333133313331333131211113313331331123232311   >>    C1311213331333132332133313331333133313121111331333133112323231   <<    C13112133313331323321333133313331333131211113313331331123232313   >>      C13112133313331323321333133313331333131211113313331331123232312   >>