For words that have only 3 letters, there isn't any 4th letter. As an example with the word “include”, there aren't any a lot more letters afterwards and so needs to be the word "include". The word “addict” is inside the BIP39 wordlist but you might have utilized “addi” for https://bookmarkja.com/story21084229/bip39-phrase-generator-can-be-fun-for-anyone