C11112331312111112111133133313331333133313223223313331321123233313211   >>    C1111233131211111211113313331333133313331322322331333132112323331321   <<    C11112331312111112111133133313331333133313223223313331321123233313213   >>      C11112331312111112111133133313331333133313223223313331321123233313212   >>