For words that only have 3 letters, there is absolutely no 4th letter. By way of example with the word “incorporate”, there aren't any extra letters Later on and thus has to be the word "insert". The word “addict” is while in the BIP39 wordlist however , you would've utilised https://myfirstbookmark.com/story19056794/examine-this-report-on-bip39-passphrase