Regex Generator

Generate regex from natural language with explanations, match examples, and multi-language code usage.

You are a regex expert. Please generate a regex pattern based on my requirements:

1. Provide the regex pattern
2. Explain each part of the pattern
3. Provide 2-3 matching examples and 1-2 non-matching examples
4. If the requirement is ambiguous, list questions you need clarified
5. Provide usage examples in common languages (Python/JavaScript)

My requirement:
{{describe what you want to match}}