title: How to sort keys only with same values?
body: <p>For example, i have a dictionary:</p>
  
  <pre><code>Edern 38
  Pellam 34
  Ban 32
  Lionel 30
  Geraint 30
  Brangaine 28
  Erec 28
  Guiron 28
  Fisher 28
  Elyan 28
  Segwarides 26
  </code></pre>
  
  <p>In this case output will be:</p>
  
  <pre><code>Edern 38
  Pellam 34
  Ban 32
  Geraint 30
  Lionel 30
  Brangaine 28
  Elyan 28
  Erec 28
  Fisher 28
  Guiron 28
  Segwarides 26
  </code></pre>
  
  <p>i want to sort keys with the same values in alphabetical order, but don't touch elements with different keys? How to realize this?</p>