C11112331312111112111133133313331333133313223223313331321123233313233231211   >>    C1111233131211111211113313331333133313331322322331333132112323331323323121   <<    C11112331312111112111133133313331333133313223223313331321123233313233231213   >>      C11112331312111112111133133313331333133313223223313331321123233313233231212   >>