Example 657
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<strong> <title> <style> <em>

<blockquote>
  <xmp> is disallowed.  <XMP> is also disallowed.
</blockquote>

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<p><strong> &lt;title> &lt;style> <em></p>
<blockquote>
  &lt;xmp> is disallowed.  &lt;XMP> is also disallowed.
</blockquote>