For words that only have three letters, there isn't a 4th letter. By way of example with the word “insert”, there are no extra letters Later on and so has to be the word "add". The word “addict” is in the BIP39 wordlist but you might have utilized “addi” for https://bookmarkcitizen.com/story18831369/examine-this-report-on-bip39-passphrase