I have a program that require all keywords to be in a single paragraph, most of the time, separated by commas

For example:

I have those terms

1-Term
1.1-Term
2-Term
3-Term
4-Term

That i collected and organized into groups and subgroups with Titles and subtitles

Title

  • 1-Term

  • 1.1-Term

  • 2-Term

    • Sub-Title
      • 3-Term
      • 4-Term

But then i want to turn them into:

1-Term, 1.1-Term, 2-Term, 3-Term, 4-Term

Removing certain marked words(Titles and sub-Titles), any Empty/Blank space, and Line breaks, while adding the commas between The Terms. I want to keep certain dashes “-”(like in words )

1-Term,1.1 -Term,2-Term,3-Term,4-Term