I have a handful of plain-text Notepad (.txt) files filled with email addresses. The addresses appear in a mixed format—some are on their own line, others sit in long comma-separated strings, and a few are buried inside paragraphs. I need every duplicate stripped out so I end up with one clean, de-duplicated list. Your task * Parse each text file, no matter how the emails are spaced or punctuated. * Extract every valid address, compare them case-insensitively, and remove repeats. * Return one TXT (or CSV if you prefer) containing the unique emails only, plus a short note telling me how many duplicates you found. Accuracy is key: the final list must keep every legitimate address exactly as written while eliminating all copies. Regular expressions, Python, PowerShell, Excel—use whatever tool you’re fastest with, as long as the job is precise and the output is ready for me to paste straight into my mailing platform.