Okay, let me try to work through this. The user wants every word in the provided text to have three variants in the format opt1, keeping brand names like AutoCAD Civil 3D intact. I need to make sure not to alter any proper nouns or brand names, only the other words. Let me start by parsing the text paragraph by paragraph.
Next, "Creating a Custom Subassembly" – Custom is okay, Subassembly is a proper noun. "Creating" could be developing, generating, forming.
For "and", plus (but need three unique). Hmm, maybe plus? Subassembly Composer Autocad Civil 3d Tutorial Pdf
"can": must (three letters each).
"Get" could be obtain? But "obtain" is 7 letters. Wait, no. Need three-letter words. So "get" synonyms: maybe acq? But "acq" isn't standard. Alternatively, maybe earn? Okay, let me try to work through this
"such" is four, "are".
Given that, proceed with best possible synonyms, even if they are longer than three letters. Let me start by parsing the text paragraph by paragraph
"In the Corridor Properties window, click on the “Subassemblies” tab, and then click on the “Add” button."