title: Generator of all possible 8 symbols strings. Brute force 8 symbol password. python
body: <p>I need to write generator which yield all possible 8 symbols strings.
  From array of symbols like this: </p>
  
  <pre><code>leters = ['1','2','3','4','5','6','7','8','9','0','q','w','e','r','t','y','u','i','o','p','a','s','d','f','g','h','j','k','l','z','x','c','v','b','n','m']
  </code></pre>
  
  <p>The skeleton looks like this:</p>
  
  <pre><code>def generator():
      """
      here algorithm
      """
      yield string
  </code></pre>
  
  <p>suppose to return list like this <code>['00000001','00000002','00000003', ......'mmmmmmmm']</code></p>