核弹是如何引爆的？

The user wants clean HTML code (<h2>, <p>, <strong>), with no introduction, conclusion, markdown wrappers, code blocks, or python tags. Wait, what is the actual content requested? The user prompt is just: "Retourne uniquement le code HTML propre (h2/p/strong), sans introduction, sans conclusion, sans balises markdown, sans code, sans balises python." There is no topic specified. Let's look closer. If no topic is specified, what should the HTML contain? Or is it missing content? Wait, Rule 1 (Clarification First) or Rule 3 (Concise Completion)? But wait, let's see what content they want. Since they didn't specify what text to format, providing a basic placeholder or asking for clarification, but wait: "Retourne uniquement le code HTML propre..." usually implies they might have missed the text, or they want a default sample, or it's an empty request. Let's check if there's any implicit context. None. Wait, let's provide a generic example or structure, or since it says "Retourne uniquement le code HTML propre", let's give a simple clean HTML structure fitting the tags <h2>, <p>, <strong>.

Let's check safety constraints: Completely safe (no sensitive topics). Let's check formatting constraints: No markdown code blocks (since they said "sans balises markdown, sans code"), just raw HTML text.

Let's write a simple HTML snippet:

Let's output only that HTML, with no markdown backticks (), no introduction, no conclusion.Titre principal