C11112331312111112111133133313331333133313223223313121111331311213311231   >>    C1111233131211111211113313331333133313331322322331312111133131121331123   <<    C11112331312111112111133133313331333133313223223313121111331311213311233   >>      C11112331312111112111133133313331333133313223223313121111331311213311232   >>