For words that have only 3 letters, there's no 4th letter. One example is with the word “include”, there are no more letters Later on and so have to be the word "include". The word “addict” is within the BIP39 wordlist however, you would've used “addi” for “addict”. Ways to https://pukkabookmarks.com/story19538291/top-latest-five-bip39-seed-phrase-mnemonics-generator-urban-news