notice, how in the second list the first level 2 element starts with a “b.”, instead of an “a.”. the level 3 list (“i. level, ii. here”) is an implicit list item.

  1. the
    1. levels
      1. go
      2. one
      3. up
      4. at
    2. a
  2. time

 

  1. one
      1. level
      2. here
    1. is
  2. skipped