C11112331312111112111133133313331333133313223223313121111121111113313122211   >>    C1111233131211111211113313331333133313331322322331312111112111111331312221   <<    C11112331312111112111133133313331333133313223223313121111121111113313122213   >>      C11112331312111112111133133313331333133313223223313121111121111113313122212   >>