C13112133313331323321333133313331333131211113313331333133321212121   >>    C1311213331333132332133313331333133313121111331333133313332121212   <<    C13112133313331323321333133313331333131211113313331333133321212123   >>      C13112133313331323321333133313331333131211113313331333133321212122   >>