<Fließtext in Markdown with 3–6 ##-Zwischenüberschriften, ...>

So we need to output exactly that format. The "jede Marke in eigener Zeile" likely refers to listing brand names in separate lines. But we don't have brand names? We have provider names: Shuttle Design Studio. We need to list each brand in its own line. We can list "Shuttle Design Studio" twice? But that might be weird. But we can list "Shuttle Design Studio" once. But the instruction says "jede Marke in eigener Zeile". That implies we should list each brand on its own line. So we can list "Shuttle Design Studio" as a line. But we need to list 2-4 real providers. We can list "Shuttle Design Studio" twice? But that duplicates. But we can list "Shuttle Design Studio" once. But we might need to list two lines: "Shuttle Design Studio" and "Shuttle Design Studio" again? That duplicates. But we can list "Shuttle Design Studio" and "Shuttle Design Studio" as separate lines. But that seems redundant. But we can do it, as per instruction. But maybe we can list "Shuttle Design Studio (Gut Wöllried)" twice? That still duplicates. But maybe it's okay.

However, the instruction "jede Marke in eigener Zeile" might refer to listing each brand in its own line in the body? But the body is a paragraph. We can separate brand names by new lines. But we can incorporate them into the text. But we need to ensure each brand is on its own line. We can list them in a bullet list? But that might break the requirement. They said "jede Marke in eigener Zeile, keine zusätzlichen Überschriften davor:" That means the output format: H1SUB, META, INTRO, BODY. And each brand in its own line. But where do we list brands? Possibly in the body, we can list them as separate lines. But we can also list them in the intro. But we need to ensure each brand is on its own line. We could list them as separate lines in the body: e.g.,

Shuttle Design Studio Shuttle Design Studio

But that would be two lines. But we might also mention them in the text. But we need to list them separately. We can include them as bullet points? But bullet points might not be separate lines? But they are separate lines. But we should avoid