सकारात्मक और नकारात्मक उदाहरणों से Regex.

1–100 positive and up to 100 negative lines, 200 characters per line. Fixed UTF-16 positions, supplied examples only; no general grammar inference.

Infer fixed-position character classes with an exact-alternative fallback. 1–100 positive and up to 100 negative lines, 200 characters per line. Fixed UTF-16 positions, supplied examples only; no general grammar inference. Input remains in this browser page.

Run the editable example to inspect the result.