C312312111133131121333133313113313331333133313331333133112331312121   >>    C31231211113313112133313331311331333133313331333133313311233131212   <<    C312312111133131121333133313113313331333133313331333133112331312123   >>      C312312111133131121333133313113313331333133313331333133112331312122   >>