text: SELECT 
      CITY 
  FROM
      (SELECT DISTINCT 
          CITY 
      FROM 
          STATION
      WHERE 
          (CITY LIKE 'A%' OR
          CITY LIKE 'I%' OR
          CITY LIKE 'O%' OR
          CITY LIKE 'U%' OR
          CITY LIKE 'E%')) 
  AS 
      subTable
  WHERE
      (CITY LIKE '%a' OR
      CITY LIKE '%i' OR
      CITY LIKE '%u' OR
      CITY LIKE '%e' OR
      CITY LIKE '%o');