C13112133313331323321333133313331333131211113313331333133313312121   >>    C1311213331333132332133313331333133313121111331333133313331331212   <<    C13112133313331323321333133313331333131211113313331333133313312123   >>      C13112133313331323321333133313331333131211113313331333133313312122   >>