Enumerated lists

1. This is an enumerated list.
2. Enumerators may be arabic numbers, letters, or roman numerals.

And a deeper list:

1. Item 1 initial text.
   1. Item 1a.
   2. Item 1b.
   3. 1. Item 2a.
      2. Item 2b.
      Paragraph in list...

And not in list anymore.