<?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="simple" page-height="29.7cm" page-width="21cm" margin="1cm 2.5cm 2cm 2.5cm">
      <fo:region-body margin-top="3cm"/>
      <fo:region-before extent="3cm"/>
      <fo:region-after extent="1.5cm"/>
    </fo:simple-page-master>
  </fo:layout-master-set>
  <fo:page-sequence master-reference="simple">
    <fo:flow flow-name="xsl-region-body">
      <fo:block-container writing-mode="lr">
        <fo:block><fo:bidi-override unicode-bidi="bidi-override" direction="rtl">AB</fo:bidi-override>cd</fo:block>
      </fo:block-container>
    </fo:flow>
  </fo:page-sequence> 
</fo:root>