C11112331312111112111133133313331333133112111111331333133313331333132332223121   >>    C1111233131211111211113313331333133313311211111133133313331333133313233222312   <<    C11112331312111112111133133313331333133112111111331333133313331333132332223123   >>      C11112331312111112111133133313331333133112111111331333133313331333132332223122   >>