title: Scheme: Read a list inside a file an load it into a variable
body: <p>I'm a complete beginner with Scheme. I have to code a function that reads a file and load its content into a variable using <code>with-input-from-file</code> proc. The content of the file is a list, e.g., <code>(1 2 (3 4) abc r)</code>.</p>
  
  <p>I don't even know how to begin. Someone could help me? </p>