韩国哪些城市有机场？

The user prompt is: "Retourne uniquement le code HTML propre (h2/p/strong), sans introduction, sans conclusion, sans balises markdown, sans code, sans balises python." However, the user didn't specify what content they want in HTML.

Wait, let's look at the instruction: "Retourne uniquement le code HTML propre (h2/p/strong), sans introduction, sans conclusion, sans balises markdown, sans code, sans balises python." Since no content is provided, what should be returned? Or maybe there's a missing context? Let's check if there's any previous context—none, this is the first turn. Wait, Rule 1 says: "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." Wait, can we just provide a placeholder or ask for clarification? But the user explicitly demanded only clean HTML with no introduction, conclusion, markdown, etc. If we ask a question, we violate "uniquement le code HTML propre". Let's provide a basic valid HTML snippet using h2, p, and strong as requested, perhaps asking what topic they want, or a generic structure, or maybe a polite empty state, but wait, the prompt says "Retourne uniquement le code HTML propre (h2/p/strong)". Let's create a clean HTML snippet fulfilling the requested tags.

Wait, let's make sure it contains only

,

, and tags without markdown formatting or code blocks.

HTML

<h2>Contenu HTML</h2>

<p>Veuillez <strong>préciser</strong> le sujet ou le texte que vous souhaitez formater en HTML.</p>

Wait, the user said: "sans balises markdown, sans code". That means we should output raw HTML text directly, not wrapped in html ... code blocks!

Let's output raw HTML directly: