C3123121111121111131213331333133313331333133313332112323132333132323221221   >>    C312312111112111113121333133313331333133313331333211232313233313232322122   <<    C3123121111121111131213331333133313331333133313332112323132333132323221223   >>      C3123121111121111131213331333133313331333133313332112323132333132323221222   >>