For words that have only three letters, there isn't a 4th letter. For example with the word “include”, there won't be any additional letters afterwards and so has to be the word "include". The word “addict” is within the BIP39 wordlist but you would have used “addi” for “addict”. gravity https://45listing.com/story21054110/5-simple-techniques-for-bip39-seed-phrase