Wait, but the user might want each word in {} with three options. So each word is replaced in c format, maintaining the original sentence structure with the alternatives.
I need to ensure that each word is replaced unless it's a proper noun. For example, "Download the PDF" becomes Retrieve the PDF file. Wait, "PDF" is an abbreviation but in this context, it's part of the manual's file type, which is a proper noun? Or is it a common noun? Hmm, "PDF" stands for Portable Document Format, so it's a proper noun. Therefore, it should stay. But the user might not have specified "PDF" as a proper noun, so I might need to replace it. Wait, the instruction says proper nouns stay, but "PDF" isn't a proper noun. Maybe the user wants it to stay as it's a specific file type. Wait, this is getting a bit tricky. Let me check again. manual tajima tmef 612 pdf
Yes, the task is to replace each word (excluding proper nouns) with three variants in b format. So the output will be the same as the input structure but with each word (not proper noun) replaced by its options. Wait, but the user might want each word