For words that have only three letters, there is absolutely no 4th letter. For example with the word “include”, there won't be any far more letters Later on and therefore must be the word "add". The word “addict” is inside the BIP39 wordlist however you would have employed “addi” for https://easiestbookmarks.com/story19556591/bip39-phrase-generator-can-be-fun-for-anyone