C13112133313331323321333133313331333133313331333133313331312111133133311222121   >>    C1311213331333132332133313331333133313331333133313331333131211113313331122212   <<    C13112133313331323321333133313331333133313331333133313331312111133133311222123   >>      C13112133313331323321333133313331333133313331333133313331312111133133311222122   >>