C13112133313331323321333133313331333133313331333133313331312111112111113212121   >>    C1311213331333132332133313331333133313331333133313331333131211111211111321212   <<    C13112133313331323321333133313331333133313331333133313331312111112111113212123   >>      C13112133313331323321333133313331333133313331333133313331312111112111113212122   >>