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# The user is asking for clean HTML code (h2, p, strong) with no introduction, no conclusion, no markdown tags, no code blocks, no python tags.
# Wait, what content should be inside the HTML? The user didn't specify the topic! Let me check if there's any context or if I should provide a default or ask for clarification, but the prompt says "Retourne uniquement le code HTML propre...". Since there's no topic specified, let's look closer. Wait, let's write a simple HTML or check if there's any preceding context. There is no preceding context.
# Let's see what we can output. If no topic is given, maybe a generic heading and paragraph? Or maybe the user forgot to specify the text?
# Let's check 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."
# But the user also specified: "Retourne uniquement le code HTML propre (h2/p/strong), sans introduction, sans conclusion..."
# If I ask a clarifying question, it violates "Retourne uniquement le code HTML propre". But without a topic, what HTML?
# Let's output a simple structure or check if there's a standard placeholder, or maybe a brief clarification. Wait, let's look at the instruction: "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."