C11112331312111112111133133313331333133313223223313121111132313233111   >>    C1111233131211111211113313331333133313331322322331312111113231323311   <<    C11112331312111112111133133313331333133313223223313121111132313233113   >>      C11112331312111112111133133313331333133313223223313121111132313233112   >>