C3123121111121111131213331333133313331333133313332112323133313233221211   >>    C312312111112111113121333133313331333133313331333211232313331323322121   <<    C3123121111121111131213331333133313331333133313332112323133313233221213   >>      C3123121111121111131213331333133313331333133313332112323133313233221212   >>