Xsl copy nodes

 Hi,
 I'm new to xsl.
 I have the following xml
  <CLUSTERLIST>
     <CLUSTER>
	  <STORY ID="1">
	  <CLUSTER>
        	<STORY ID="2">
	  </CLUSTER>
     </CLUSTER>
     <STORYLIST>
	  <STORY ID="1" ATT1="att1" ATT2="att2"/>
        <STORY ID="2" ATT1="att1" ATT2="att2"/>
     </STORYLIST>
  </CLUSTERLIST>


The output I want is
  <CLUSTERLIST>
     <CLUSTER>
	  <STORY ID="1" ATT1="att1" ATT2="att2"/>
        <CLUSTER>
		<STORY ID="2" ATT1="att1" ATT2="att2"/>
        </CLUSTER>
     </CLUSTER>
  </CLUSTERLIST>

 So I just want to move the story nodes from the story list to the
corresponding positions (by matching the ids) under cluster nodes

Thanks in advance,
Ravi.