The XSL-FO Output

<?xml version="1.0" encoding="utf-8"?>
<fo:root xmlns:fo="http://www.w3.org/1999/XSL/Format">
   <fo:layout-master-set>
      <fo:simple-page-master master-name="only">
         <fo:region-body/>
      </fo:simple-page-master>
   </fo:layout-master-set>
   <fo:page-sequence master-reference="only">
      <fo:flow flow-name="xsl-region-body">
         <fo:block font-size="20pt" font-family="serif" line-height="30pt">Hydrogen</fo:block>
         <fo:block font-size="20pt" font-family="serif" line-height="30pt">Helium</fo:block>
      </fo:flow>
   </fo:page-sequence>
</fo:root>