First H1 - This Should Stay as H1
This is some content under the first H1.
Second H1 - This Should Become H2
This content is under what should become an H2.
Regular H2
This is a regular H2 that should remain unchanged.
Third H1 - This Should Also Become H2
More content here.
Regular H3
This H3 should remain as is.
Fourth H1 - Another One That Should Become H2
Final test content here.