button.
            </li>
            <li>
              <kbd>Left Arrow</kbd> and <kbd>Up Arrow</kbd>: move focus to the previous radio button in the group, uncheck the previously focused button, and check the newly focused button.
              If focus is on the first button, focus moves to the last button.
            </li>
          </ul>
          <div class="note">
            <h3>Note</h3>
            <p>The initial focus behavior described above differs slightly from the behavior provided by some b