For words that have only three letters, there isn't a 4th letter. One example is with the word “add”, there are no more letters afterwards and thus must be the word "include". The word “addict” is within the BIP39 wordlist however, you might have utilized “addi” for “addict”. Should you https://hubwebsites.com/story20355380/fascination-about-invalid-bip39-phrase