proper "terms remain. only" generate writing".
Alternatively, if the user intended that "Proper" is a proper noun (like in a title) and should stay, but in the given example, "Proper" is not a proper noun. This is a bit ambiguous. Since the user's instruction says "Proper nouns stay", but without the input text having any proper nouns, it's safer to assume that all words need to be replaced. So proceeding with that.
So the next step is to take each word in the text and generate three synonyms. For example, "Proper" can be replaced with appropriate, "nouns" with pronouns, "stay" with stay, etc. Wait, but "stay" might not have three different synonyms. Also, the user's example response for the first word was written as proper_noun|noun|pronoun, which seems like placeholders. So perhaps the user wants the actual synonyms to be in the spintax format, and I have to come up with real synonyms for each word.
Proper -> right nouns -> terms stay -> reside Only -> merely output -> generate text -> words
Processed with synonyms:
So the final spintax would be: