C1111121111331311211331333133313331333112211231211113313232232133313221   >>    C111112111133131121133133313331333133311221123121111331323223213331322   <<    C1111121111331311211331333133313331333112211231211113313232232133313223   >>      C1111121111331311211331333133313331333112211231211113313232232133313222   >>