Bip39 spec https://go.bubbl.us/ebe220/f17a?/Bookmarks BIP85: A more recent proposal enabling the deterministic derivation of a number of BIP39 mnemonic seeds from the grasp seed. For words that only have three letters, there is not any 4th letter. One example is Along with the word “include”, there isn't any far more letters https://thebookmarknight.com/story20583567/bip39-que-es-helping-the-others-realize-the-advantages-of-bip39-passphrase-https-cutt-ly-uryc5rw7