For words that only have three letters, there's no 4th letter. By way of example with the word “include”, there isn't any additional letters afterwards and so need to be the word "include". The word “addict” is during the BIP39 wordlist however, you would have used “addi” for “addict”. You https://eternalbookmarks.com/story18689922/top-latest-five-bip39-words-urban-news