Bip39 longest word https://squareblogs.net/edelinepge/using-python-to-produce-a-bip39-mnemonic-a-developers-point-of-view 3a43fced052690635cc9fdce418514528b000dff3eaa5b986ea7be809062e775f2fe99c76733ff200b56fb70cac7c6ac7818b1e8139192a70fe274f5bf57fa46 For words that only have 3 letters, there isn't a 4th letter. For example While using the word “include”, there aren't any extra letters... https://archerujcb329.tearosediner.net/comprehending-the-function-of-bip39-in-copyright-pocketbooks