C31231211111133131211113313331333132233131211111211113313223313331221   >>    C3123121111113313121111331333133313223313121111121111331322331333122   <<    C31231211111133131211113313331333132233131211111211113313223313331223   >>      C31231211111133131211113313331333132233131211111211113313223313331222   >>