span> and ways of building complex patterns however. Let's look at a
      few of the common ones, and then some examples:</p>
      <table border="0">
        <tbody>
          <tr>
            <td><span class="emphasis"><i class="EMPHASIS">.</i></span> - Matches any single character, e.g.
            <span class="QUOTE">"a"</span>, <span class="QUOTE">"A"</span>, <span class="QUOTE">"4"</span>,
            <span class="QUOTE">":"</span>, or <span class="QUOTE">"@"</span>.</td>
          </tr>
        </tb