For words that have only 3 letters, there is no 4th letter. As an example with the word “increase”, there won't be any a lot more letters afterwards and so has to be the word "incorporate". The word “addict” is within the BIP39 wordlist however you would've utilized “addi” for https://userbookmark.com/story18832652/top-latest-five-bip39-words-urban-news