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SELECT DISTINCT CITY FROM STATION
WHERE LOWER(SUBSTR(CITY,1,1)) = 'a'
OR LOWER(SUBSTR(CITY,1,1)) = 'e'
OR LOWER(SUBSTR(CITY,1,1)) = 'i'
OR LOWER(SUBSTR(CITY,1,1)) = 'o'
OR LOWER(SUBSTR(CITY,1,1)) = 'u';
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Weather Observation Station 6
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SELECT DISTINCT CITY FROM STATION WHERE LOWER(SUBSTR(CITY,1,1)) = 'a' OR LOWER(SUBSTR(CITY,1,1)) = 'e' OR LOWER(SUBSTR(CITY,1,1)) = 'i' OR LOWER(SUBSTR(CITY,1,1)) = 'o' OR LOWER(SUBSTR(CITY,1,1)) = 'u';