Weather Observation Station 8

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    SELECT DISTINCT(CITY) FROM STATION WHERE SUBSTR(CITY, 1,1) IN ('a', 'e', 'i', 'o', 'u') AND SUBSTR(CITY, -1, 1) IN ('a', 'e', 'i', 'o', 'u'); OR SELECT DISTINCT CITY FROM STATION WHERE CITY REGEXP '^[aeiou]' AND CITY REGEXP '[aeiou]$';