Regex Pattern Creation & Testing

Create a regex pattern for this task.

What I need to do: [Extract / Validate / Replace] - [describe the specific pattern]

Test cases - SHOULD MATCH:

1. [example that should match]
2. [example that should match]
3. [example that should match]

Test cases - should NOT match:

1. [example that should NOT match]
2. [example that should NOT match]
3. [example that should NOT match]

Specific requirements:

• Case sensitivity: [case-sensitive / case-insensitive]
• Boundaries: [must be whole word / can be part of word]
• Capturing: [what parts need to be captured for extraction]
• Special characters: [any special characters to handle]

Context:

• Language/tool: [JavaScript/Python/grep/etc. - syntax varies]
• Use case: [form validation / log parsing / data cleaning]

What I need:

1. The regex pattern (complete and tested)
2. Explanation of each part (what each component does)
3. Test results (verify it matches/rejects correctly)
4. Common mistakes to avoid (pitfalls with this pattern)
5. Performance considerations (if processing large amounts)

Success criteria: Pattern works correctly on all test cases and I understand how to modify it if needed.