text: 
  -- https://www.hackerrank.com/challenges/weather-observation-station-12/problem?isFullScreen=true&h_r=next-challenge&h_v=zen&h_r=next-challenge&h_v=zen&h_r=next-challenge&h_v=zen&h_r=next-challenge&h_v=zen
  
  SELECT DISTINCT CITY FROM STATION WHERE left(CITY, 1) NOT IN ('a','e','o','u','i') AND 
  right(CITY,1) NOT IN ('a','e','o','u','i')
  