Oracle burrs

It will work only if to remove small Russian letter p (sounds like r)

declare
  buffer   varchar2(2000);
  parser   xmlparser.Parser;
  xmlClob  CLOB;
begin
   parser := xmlparser.newParser;
   buffer := '<?xml version="1.0" encoding="ISO-8859-5"?>'
       ||'<root>абвгдежзиклмнопрстуфхцчшщьыъэюя</root>';
   dbms_lob.createtemporary(xmlClob, TRUE);
   dbms_lob.open(xmlClob, dbms_lob.lob_readwrite);
   dbms_lob.write(xmlClob,length(buffer),1,buffer); 
   xmlparser.parseClob(parser, xmlClob);      
   xmlparser.freeParser(parser);
end;