Bip39 tool github https://postheaven.net/tiablexcen/recognizing-the-duty-of-bip39-in-copyright-budgets 3a43fced052690635cc9fdce418514528b000dff3eaa5b986ea7be809062e775f2fe99c76733ff200b56fb70cac7c6ac7818b1e8139192a70fe274f5bf57fa46 For words that only have three letters, there is absolutely no 4th letter. One example is Along with the word “include”, there aren't any additional letter... https://www.slideserve.com/lewarthbfp/getting-a-bip39-phrase-in-python-a-comprehensive-tutorial