name = 'conc/3'
slug = 'concatenate two lists'

description = '''\
<p><code>conc(L1, L2, L)</code>: the list <code>L</code> is obtained by appending the elements of <code>L2</code> to <code>L1</code>.</p>
<pre>
?- conc([1,2], [3,4], X).
  X = [1,2,3,4].
?- conc(X, [], [1,2,3]).
  X = [1,2,3].
</pre>'''

hint = {}