C312312111133131121333133313113313331333133313331333133112332221   >>    C31231211113313112133313331311331333133313331333133313311233222   <<    C312312111133131121333133313113313331333133313331333133112332223   >>      C312312111133131121333133313113313331333133313331333133112332222   >>