C13112133313331323321333133313331333133313331323131133133313223111   >>    C1311213331333132332133313331333133313331333132313113313331322311   <<    C13112133313331323321333133313331333133313331323131133133313223113   >>      C13112133313331323321333133313331333133313331323131133133313223112   >>