For words that only have 3 letters, there isn't a 4th letter. For example with the word “include”, there won't be any extra letters Later on and thus should be the word "increase". The word “addict” is within the BIP39 wordlist however, you would have utilized “addi” for “addict”. gravity https://madbookmarks.com/story19607129/bip39-seed-phrase-fundamentals-explained