(HTML
(head
)head
(BODY
(h1
"Header1
)h1
"\n
(script
"\ndocument.write('ABC');\n<!--\ndocument.write("<script>document.write('Hello, World')</script>");\n//-->\ndocument.write('XYZ');\n
)script
"\n
(h2
"Header2
)h2
)BODY
)HTML