[DelWithGroup([DelWithGroup([DelGroup([DelSkip(9)])])])]
[AddWithGroup([AddWithGroup([AddGroup({"tag": "h1"}, [AddSkip(9)])])])]

[DelWithGroup([DelWithGroup([DelGroup([DelSkip(9)])])])]
[AddWithGroup([AddWithGroup([AddGroup({"tag": "h2"}, [AddSkip(9)])])])]