grouping probs

Hi,
I have a grouping problem..
the following is my xml
<?xml version="1.0"?>
<Items>

	<books>
		<book catagory = "xslt">XSLT Ref</book>
		<book catagory = "java">Java Complete  Ref</book>
		<book catagory = "xslt">XSLT Ref</book>
		<book catagory = "java">Java Complete  Ref</book>
		<book catagory = "xml"> xml/Java Guide</book>
	</books>
	<fruits>
		<fruit type = "pulp">Mango</fruit>
		<fruit type = "dry">Dates</fruit>
		<fruit type = "pulp">Orange</fruit>
		<fruit type = "seedy">Pomegranate</fruit>
		<fruit type = "pulp">Mango</fruit>
		<fruit type = "seedy">Pomegranate</fruit>
	</fruits>
</Items>

I have to write an xsl that would convert the above xml to ..
<?xml version="1.0"?>
<Items>

	<books>
		<book catagory = "xslt">XSLT Ref</book>
		<book catagory = "java">Java Complete  Ref</book>
		<book catagory = "xml"> xml/Java Guide</book>
	</books>
	<fruits>
		<fruit type = "pulp">Mango</fruit>
		<fruit type = "dry">Dates</fruit>
		<fruit type = "pulp">Orange</fruit>
		<fruit type = "seedy">Pomegranate</fruit>
	</fruits>
</Items>

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