Top #1
Top #2 has children
Sub #1
Sub #2
Third #1
Third #2
Third #3
Fouth #1
Fouth #2
Fouth #3
Third #4
Sub #3
Sub #4
Top #3
Top #4 has children
Sub #1
Sub #2
Sub #3
Sub #4
Third #1
Third #2
Third #3
Fouth #1
Fouth #2
Fouth #3
Third #4