C11112331312111112111133133313331333133313331333133313331211113313223121121   >>    C1111233131211111211113313331333133313331333133313331333121111331322312112   <<    C11112331312111112111133133313331333133313331333133313331211113313223121123   >>      C11112331312111112111133133313331333133313331333133313331211113313223121122   >>