C11112331312111112111133133313331333133313223223313331331123133313121   >>    C1111233131211111211113313331333133313331322322331333133112313331312   <<    C11112331312111112111133133313331333133313223223313331331123133313123   >>      C11112331312111112111133133313331333133313223223313331331123133313122   >>