C3123121111121111131213331333133313331333133313332112323132333133313233221221   >>    C312312111112111113121333133313331333133313331333211232313233313331323322122   <<    C3123121111121111131213331333133313331333133313332112323132333133313233221223   >>      C3123121111121111131213331333133313331333133313332112323132333133313233221222   >>