C31231211113313112133313331311331333133313331333133313331333133313231122221   >>    C3123121111331311213331333131133133313331333133313331333133313331323112222   <<    C31231211113313112133313331311331333133313331333133313331333133313231122223   >>      C31231211113313112133313331311331333133313331333133313331333133313231122222   >>