Bip39 invalid mnemonic https://www.slideserve.com/lewarthbfp/getting-a-bip39-phrase-in-python-a-comprehensive-tutorial The last phase of BIP-39 is making the particular binary seed which is then utilized like a grasp critical in BIP-32 deterministic wallet or applying other methods. For words that have only 3 letters, there isn't a 4th letter. Such as with the word “add”, there https://bookmarkforce.com/story20084620/bip39-how-it-works-the-single-best-strategy-to-use-for-bip39-word-list-txt-https-dzen-ru-bip39-phrase-com