For words that only have 3 letters, there isn't any 4th letter. For instance with the word “add”, there are no extra letters afterwards and thus should be the word "add". The word “addict” is during the BIP39 wordlist however , you would've utilised “addi” for “addict”. Stability: Anyone with https://bookmarkahref.com/story19033293/detailed-notes-on-copyright-wallet-seed-phrase-out-of-bip39