C11112331312111112111133133313331333132323213331333133313331311331333232123131   >>    C1111233131211111211113313331333133313232321333133313331333131133133323212313   <<    C11112331312111112111133133313331333132323213331333133313331311331333232123133   >>      C11112331312111112111133133313331333132323213331333133313331311331333232123132   >>