C31231211111133131211113313331333131211111211113313232211233133313221212111   >>    C3123121111113313121111331333133313121111121111331323221123313331322121211   <<    C31231211111133131211113313331333131211111211113313232211233133313221212113   >>      C31231211111133131211113313331333131211111211113313232211233133313221212112   >>