C11112331312111112111133133313331333133313223223313121111121311211   >>    C1111233131211111211113313331333133313331322322331312111112131121   <<    C11112331312111112111133133313331333133313223223313121111121311213   >>      C11112331312111112111133133313331333133313223223313121111121311212   >>