Bip39 vs bip32 https://giphy.com/channel/ebliciwsah 3a43fced052690635cc9fdce418514528b000dff3eaa5b986ea7be809062e775f2fe99c76733ff200b56fb70cac7c6ac7818b1e8139192a70fe274f5bf57fa46 For words that only have three letters, there is absolutely no 4th letter. For instance With all the word “incorporate”, there won't be any additional letters afterwards and thus must be the word "increase"... https://companyspage.com/story5497681/bip32-and-bip39-the-smart-trick-of-bip39-wallet-that-no-one-is-discussing-https-dzen-ru-bip39-phrase-com