Bip39 standard https://gravatar.com/sparklyusually6089a4f337 3a43fced052690635cc9fdce418514528b000dff3eaa5b986ea7be809062e775f2fe99c76733ff200b56fb70cac7c6ac7818b1e8139192a70fe274f5bf57fa46 For words that only have three letters, there's no 4th letter. One example is Using the word “add”, there are no extra letters Later on and thus need to be the word "increase". The word “addict” is... https://wiishlist.com/story20687055/bip39-copyright-helping-the-others-realize-the-advantages-of-bip39-passphrase-https-cutt-ly-uryc5rw7