<?xml version="1.0"?>
<article>
  <indexterm><primary>A</primary></indexterm>
  <indexterm><primary>B</primary></indexterm>
  <indexterm><primary>BA</primary></indexterm>
  <indexterm><primary>C</primary></indexterm>
  <indexterm><primary>CB</primary></indexterm>
  <indexterm><primary>CBA</primary></indexterm>
  <indexterm><primary>C A</primary></indexterm>
  <indexterm><primary>C-A</primary></indexterm>
  <indexterm><primary>CDA</primary></indexterm>
</article>






