C3123121111121111131213331333133313331333133313332112323132333132233132221211   >>    C312312111112111113121333133313331333133313331333211232313233313223313222121   <<    C3123121111121111131213331333133313331333133313332112323132333132233132221213   >>      C3123121111121111131213331333133313331333133313332112323132333132233132221212   >>