title: Chaining together several lists that consist of more lists
body: <p>I'm currently working on a project for my Introduction to Computer Science lecture and now came across following problem: The Output of my Code are lists which contains lists and I would like to put all object from all those lists into one large list. The ourput looks like this:</p>
  
  <pre><code>[[['0452']], 
   [['1234'], ['176']], 
   [['2245'], ['2345', '2345'], ['2545']], 
   [['3452', '3432'], ['3523']],
   [['44563'], ['4523']],
   [['5234', '5234', '5234'], ['5435'], ['563']],
   [['6435']], 
   [['7134']],
   [['8324']], 
   ['923', '9936']
  ]
  </code></pre>