title: Regex not working with sed
body: <p>i have this text in file</p>
  
  <pre><code>"0000000441244"
  "0000000127769"
  </code></pre>
  
  <p>I want to replace all zeros with 'L'</p>
  
  <p>I am trying this and nothing gets chnaged</p>
  
  <p><code>sed -e 's/0+/L/g' regex.txt</code></p>
  
  <p><code>sed -e 's/(0+)/L/g' regex.txt</code></p>
  
  <p>I want to know where i am wrong</p>