CodePen Embed - Запись CSS-стилей через (пробел)

<h2>Запись CSS-стилей через (пробел) - 2</h2>

<ul>
  <li>Один</li>
  <li>
    <div>
      <span>
        <strong>Д в а</strong>
      </span>
    </div>
  </li>
  <li>Три</li>
  <li>Четыре</li>
  <li>Пять</li>
</ul>

ul strong {
  background-color: yellow;
}

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