Nested and mixed lists are an interesting beast. It’s a corner case to make sure that

Ordered — Unordered — Ordered

  1. ordered item
  2. ordered item
    • unordered
    • unordered
      1. ordered item
      2. ordered item
  3. ordered item
  4. ordered item

Ordered — Unordered — Unordered

  1. ordered item
  2. ordered item
    • unordered
    • unordered
      • unordered item
      • unordered item
  3. ordered item
  4. ordered item

Unordered — Ordered — Unordered

Unordered — Unordered — Ordered