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SELECT DISTINCT City FROM Station
WHERE
LOWER(SUBSTR(City,1,1)) NOT IN ('a','e','i','o','u') OR
LOWER(SUBSTR(REVERSE(City),1,1)) NOT IN ('a','e','i','o','u');
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Weather Observation Station 11
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--Oracle SQL
SELECT DISTINCT City FROM Station WHERE LOWER(SUBSTR(City,1,1)) NOT IN ('a','e','i','o','u') OR LOWER(SUBSTR(REVERSE(City),1,1)) NOT IN ('a','e','i','o','u');