title: regular expression to find last letter and first letter of string
body: <p>I need to find whether the last letter and first letter of the string is vowels (a,e,i,o,u). I want to do this in a regular expression. </p>
  
  <pre><code>select distinct city from station where city regexp '*.^[aeiou]$' and city regexp '^[aeiou].*';
  
  First letter: ^[aeiou].*
  last letter : *.^[aeiou]$
  </code></pre>
  
  <p>Here first letter identification is working fine but last letter regular expression is not working</p>