<anonymous-block>
  <span>
    A
    <b style="display: run-in">B</b>
  </span>
</anonymous-block>
<div>C</div>
<anonymous-block>
  <span>D</span>
</anonymous-block>

<anonymous-block>
  <span>
    A
    <anonymous-block>
      <b style="display: run-in">B</b>
    </anonymous-block>
  </span>
</anonymous-block>
<div>C</div>
<anonymous-block>
  <span>D</span>
</anonymous-block>

<anonymous-block>
  <anonymous-block>
    <span>A</span>
  </anonymous-block>
  <anonymous-block>
    <b style="display: run-in">B</b>
  </anonymous-block>
  <anonymous-block>
    <span></span>
  </anonymous-block>
</anonymous-block>
<div>C</div>
<anonymous-block>
  <span>D</span>
</anonymous-block>

<span>
  A
  <div>
    <b style="display: run-in">B</b>
    C
  </div>
  D
</span>

<anonymous-block>
  <span>A</span>
</anonymous-block>
<div>
  <b style="display: run-in">B</b>
  C
</div>
<anonymous-block>
  <span>D</span>
</anonymous-block>