C312312111111331312111133133313331333133313232233133313331333131212231   >>    C31231211111133131211113313331333133313331323223313331333133313121223   <<    C312312111111331312111133133313331333133313232233133313331333131212233   >>      C312312111111331312111133133313331333133313232233133313331333131212232   >>