Bip39 to private key https://squareblogs.net/edelinepge/using-python-to-produce-a-bip39-mnemonic-a-developers-point-of-view BIP85: A more moderen proposal making it possible for the deterministic derivation of several BIP39 mnemonic seeds from the learn seed. For words that have only three letters, there is absolutely no 4th letter. Such as With all the word “add”, there won't be any https://atozbookmarkc.com/story20910473/official-bip39-word-list-5-tips-about-bip39-checksum-you-can-use-today-https-linktr-ee-bip39