text: -- https://www.hackerrank.com/challenges/weather-observation-station-11/problem
  
  SELECT DISTINCT(CITY) FROM STATION WHERE LEFT(CITY, 1) NOT IN ('a', 'e', 'i', 'o', 'u') 
                                      OR  RIGHT(CITY, 1) NOT IN ('a', 'e', 'i', 'o', 'u') ;