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<?php 
				
	$cats = array();
	foreach(wp_get_post_categories($post->ID) as $c)
	{
		$cat = get_category($c);
		array_push($cats,$cat->name);
	}
	
	if(sizeOf($cats)>0)
	{
		$post_categories = implode(',',$cats);
	} else {
		$post_categories = "Not Assigned";
	}
	
	echo "Categories for this post are: " . $post_categories;

?>