ements of <code>neighbors</code> that are not members of <code>employees</code> are added to
<code>employees</code>. In particular, the names <code>&quot;Bethany&quot;</code> and <code>&quot;Eric&quot;</code> are
removed from <code>employees</code> while the name <code>&quot;Forlani&quot;</code> is added.</p>
<pre><code class="language-swift">var employees: Set = [&quot;Alicia&quot;, &quot;Bethany&quot;, &quot;Diana&quot;, &quot;Eric&quot;]
let neighbors: Set = [&quot;Bethany&quot;, &quot;Eric&quot;, &quot;