水牙线对牙齿好吗？

The user is asking for clean HTML code (using <h2>, <p>, <strong>), with no introduction, conclusion, markdown tags, code blocks, or python tags. However, they haven't specified what content should be inside the HTML.

Wait, let's look at Rule 1 (Clarification First): "If critical information is genuinely missing and the prompt cannot be reasonably answered without it, ask a brief clarifying question before generating a full solution." Alternatively, what if they didn't provide any text? Let's check if there's any hidden context or if they just gave a generic prompt. They just said "Retourne uniquement le code HTML propre (h2/p/strong), sans introduction, sans conclusion, sans balises markdown, sans code, sans balises python."

Since the content topic is completely missing, I should ask what content they want wrapped in that HTML, or provide a polite prompt for clarification while keeping it concise. But wait, the user requested only the clean HTML code. If I ask a question, it won't be HTML. But I can't generate HTML without knowing the topic. Let's provide a brief request for clarification.

Wait, let's follow Rule 1: "If critical information is genuinely missing and the prompt cannot be reasonably answered without it, ask a brief clarifying question before generating a full solution."

Let's reply asking what text or topic they would like me to format into HTML.De quel sujet ou texte souhaitez-vous que je génère le code HTML ?