What are the names of storms that did not affect two or more regions?
SELECT name FROM storm EXCEPT SELECT T1.name FROM storm AS T1 JOIN affected_region AS T2 ON T1.storm_id  =  T2.storm_id GROUP BY T1.storm_id HAVING count(*)  >=  2
İki veya daha fazla bölgeyi etkilemeyen fırtınaların isimleri nelerdir?