pan class='no'>.</span>)   <span class='kw'>-&gt;</span> <span class='fl'>FALSE</span>,
          <span class='fu'>..</span>(<span class='no'>.</span>, <span class='no'>NIL</span>)   <span class='kw'>-&gt;</span> <span class='fl'>FALSE</span>,
          <span class='fu'>..</span>(<span class='fu'>CONS</span>(<span class='no'>car1</span>,<span class='no'>cdr1</span>), <span class='fu'>CONS</span>(<span class='no'>car2</span>,<span class='no'>cdr2</span>)) <span class='kw'>-&gt;</span>
              <span cla