Nested Unordered Lists

[RitaRez]

How it should be in Markdown:

First option:

- First item
- Second item
- Third item
    - Indented item
    - Indented item
- Fourth item

Second Option:

+ First item
+Second item
+ Third item
    + Indented item
    + Indented item
+ Fourth item

Third Option:

* First item
* Second item
* Third item
    * Indented item
    * Indented item
* Fourth item

How it should be in HTML?

<ul>
  <li>First item</li>
  <li>Second item</li>
  <li>Third item
    <ul>
      <li>Indented item</li>
      <li>Indented item</li>
    </ul>
  </li>
  <li>Fourth item</li>
</ul>