Bip39 github https://penzu.com/p/2ea6922b70254307 3a43fced052690635cc9fdce418514528b000dff3eaa5b986ea7be809062e775f2fe99c76733ff200b56fb70cac7c6ac7818b1e8139192a70fe274f5bf57fa46 For words that only have 3 letters, there is absolutely no 4th letter. One example is Together with the word “add”, there are no additional letters afterwards and therefore has to be the word "add". The word ... https://isocialfans.com/story5522608/bip39-specification-bip39-compatible-wallet-options-https-x-com-tundra838554