Bip39 format example https://www.anobii.com/en/01000289012ff9b293/profile/activity The last action of BIP-39 is producing the particular binary seed and that is then employed like a master crucial in BIP-32 deterministic wallet or applying other strategies. For words that only have three letters, there isn't a 4th letter. One example is Together with the https://iwanttobookmark.com/story20611242/bip39-trezor-not-known-details-about-bip39-word-list-txt-https-linktr-ee-bip39