title: sorting the list in Python without .sorted()
body: <p>I have a list <code>a = ['a1', 'b1', 'c1', 'd1', 'a2', 'b2', 'c2', 'd2',]</code></p>
  
  <p>How can I get list <code>b = ['a1,', 'a2', 'b1', 'b2', 'c1', 'c2', 'd1', 'd2']</code> without using <code>.sorted()</code>?</p>
  
  <p>Thanks!</p>