---
Top A:
  - A1
  - A2:
     - A2.1
     - A2.2
Top B:
  - B1:
     - B1.1
     - B1.2

##</code><code>##

Top A,
Top A,A1,
Top A,A2,
Top A,A2,A2.1
Top A,A2,A2.2
Top B,
Top B,B1
Top B,B1,B1.1
Top B,B1,B1.2