C312312111133131121333133313113313331333133313331333133313331333133313232121221   >>    C31231211113313112133313331311331333133313331333133313331333133313331323212122   <<    C312312111133131121333133313113313331333133313331333133313331333133313232121223   >>      C312312111133131121333133313113313331333133313331333133313331333133313232121222   >>