title: How to rename files with same string and add suffix
body: <p>I have a lot of images in subdirectories with same string in filename and I want to rename this files and add an suffix on the end.</p>
  <p>Example:</p>
  <pre><code>1/AB2011-BLUE-BW.jpg
  1/AB2011-WHITE-BW.jpg
  1/AB2011-BEIGE-BW.jpg
  2/AB2011-WHITE-2-BW.jpg
  2/AB2011-BEIGE-2-BW.jpg
  1/AB2012-BLUE-BW.jpg
  1/AB2012-WHITE-BW.jpg
  1/AB2012-BEIGE-BW.jpg
  ...
  </code></pre>
  <p>I want to rename this files in</p>
  <pre><code>1/AB2011-01.jpg
  1/AB2011-02.jpg
  1/AB2011-03.jpg
  2/AB2011-04.jpg
  2/AB2011-05.jpg
  1/AB2012-01.jpg
  1/AB2012-02.jpg
  1/AB2012-03.jpg
  ...
  </code></pre>
  <p>How can I do this in bash or python? Which image get 01,02,03 doesn't matter.</p>