Bip39 hardware https://www.storeboard.com/myrtierisaliti BIP85: A more recent proposal allowing the deterministic derivation of a number of BIP39 mnemonic seeds from a grasp seed. For words that have only three letters, there is no 4th letter. Such as with the word “add”, there won't be any more letters Later on and https://rylanmecp341.wpsuo.com/bip32-vs-bip39-which-is-better-for-your-copyright-demands