
First
 First Item
 First SubItem
 First SubItem from First
 || ... 
 Second SubItem
 Second SubItem from First
 || ... 
 Third SubItem
 Third SubItem from First
 || ... 
 Second
 Second Item
 First SubItem
 First SubItem from Second
 || ... 
 Second SubItem
 Second SubItem from Second
 || ... 
 Third SubItem
 Third SubItem from Second
 || ... 
 Third
 Third SubItem
 0
 Fourth
 Fourth SubItem
 || ... 