C11112331312111112111133133313331333132323133313331313223331211233121   >>    C1111233131211111211113313331333133313232313331333131322333121123312   <<    C11112331312111112111133133313331333132323133313331313223331211233123   >>      C11112331312111112111133133313331333132323133313331313223331211233122   >>