Bip39 key https://orcid.org/0009-0002-7964-3457 BIP85: A more moderen proposal permitting the deterministic derivation of a number of BIP39 mnemonic seeds from the learn seed. For words that have only three letters, there is not any 4th letter. Such as Together with the word “add”, there are no much more letters afterwards https://icelisting.com/story21163766/bip39-wallet-the-definitive-guide-to-bip39-converter-https-dzen-ru-bip39-phrase-com