nk">c</a></span><span class="op">(</span><span class="st">"John"</span>, <span class="st">"Paul"</span>, <span class="st">"George"</span>, <span class="st">"Ringo"</span><span class="op">)</span><span class="op">)</span><span class="op">)</span></span>
<span><span class="va">m</span></span>
<span><span class="co">#&gt;       John Paul George Ringo</span></span>
<span><span class="co">#&gt; duck     1    2      3     4</span></span>
<span><span class="co">#&gt; duck     5    6      7     8</span></span>
<spa