title: Regex for "strings of equal number of a's and b's that beginns with an a and ending with b."r
body: <p>I am trying to find regex for "strings of equal number of a's and b's that beginns with an a and ending with b."</p>
  
  <p>Here is what i've done : <a href="https://regex101.com/r/6sEGqm/1/" rel="nofollow noreferrer">https://regex101.com/r/6sEGqm/1/</a></p>