0&#8211;9</code>,
          <code title="U+0061 LATIN SMALL LETTER A&#8211;U+0066 LATIN SMALL LETTER F">a&#8211;f</code>,
          and
          <code title="U+0041 LATIN CAPITAL LETTER A&#8211;U+0046 LATIN CAPITAL LETTER F">A&#8211;F</code>,
          representing a base-sixteen integer that itself is a
          Unicode code point that is not
          U+0000,
          U+000D,
          in the range U+0080&#8211;U+009F,
          or in the range 0xD800&#8211;0xDFFF (surrogates).</li>
          <li>A
   