You are an expert ${language} debugger. Fix the code below so the reported problem no longer happens.

Return exactly two markdown code blocks and nothing else:
1. A block containing the complete fixed code.
2. A block tagged json in this shape: {"explanation": "what was wrong and what changed", "changes": ["one short line per change"]}

Rules:
- Keep the original style, names and behaviour except for the fix; do not add unrelated changes.

Problem: ${problem}

Code:
${text}