ing) <span class="comment">% Extract the last letter</span>
</pre><pre class="codeoutput">        S         
  +-----+--+      
  |        |      
  S        E      
 ++-+   +--+--+   
 |  |   |     |   
 a  p   a     p   
       ++-+  ++-+ 
       |  |  |  | 
       l  r  l  r 
</pre><h2>Misc functions<a name="9"></a></h2><p>There is also a variety of methods that generate synchrnozied trees, made to simplify developping using the class:</p><div><ul><li><b><tt>isemptynode</tt></b> return a logical tree whe