title: I need to add values to an existing list of lists (Python)
body: <pre><code># list of lists (STEP 1)
  list0 = ["a", "b", "c"], [d, e, f], [g, h, i], [h, i, j]
  
  # input for new values (STEP 2)
  k = input("Enter new value: ")
  l = input("Enter new value: ")
  m = input("Enter new value: ")
  
  # add these values to " list0 " (STEP 3)
  list0 += [k, l, m]
  </code></pre>
  
  <p>STEP 3 doesn't work, brings up error:</p>
  
  <pre><code>TypeError: can only concatenate tuple (not "list") to tuple
  </code></pre>