The user prompt is in French, asking for clean HTML output (h2/p/strong) without intro, conclusion, markdown tags, code wrappers, etc. However, the user hasn't provided a topic or content to write about! Wait, let's re-read carefully: "Retourne uniquement le code HTML propre (h2/p/strong), sans introduction, sans conclusion, sans balises markdown, sans code, sans balises python."

Since the request lacks a specific topic, but asks purely for clean HTML formatting or a basic response without preamble, I should provide a helpful response or ask what topic they want, formatted cleanly in HTML as requested. But wait, system instructions say: "Lead with the direct content in the very first sentence. Do NOT write introductory greetings..." If the prompt is missing topic details: "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 format the response using standard HTML tags directly (or p/h2/strong) without markdown code blocks as requested, or brief clarifying question in HTML.

Wait, let's look at the instructions: "sans balises markdown, sans code".

Let's respond directly in HTML:

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