Plan 9 from Bell Labs’s /usr/web/sources/contrib/fernan/nhc98/src/libraries/HaXml/tests/xml-conformance/ibm/valid/P51/out/ibm51v01.xml
<root> <a> Element type a </a> <b> Element type b </b> <c> Element type c </c> <d> Element type d <c></c> </d> <e> Element type e <a></a> <b></b> <c></c> </e> </root>