 particular, the names <code>&quot;Bethany&quot;</code>
and <code>&quot;Eric&quot;</code> do not appear in <code>eitherNeighborsOrEmployees</code>.</p>
<pre><code class="language-swift">let employees: Set = [&quot;Alicia&quot;, &quot;Bethany&quot;, &quot;Diana&quot;, &quot;Eric&quot;]
let neighbors: Set = [&quot;Bethany&quot;, &quot;Eric&quot;, &quot;Forlani&quot;]
let eitherNeighborsOrEmployees = employees.symmetricDifference(neighbors)
print(eitherNeighborsOrEmployees)
// Prints &quot;[&quot;Diana&quot;, 