For words that have only 3 letters, there's no 4th letter. For instance with the word “increase”, there isn't any a lot more letters afterwards and so have to be the word "incorporate". The word “addict” is while in the BIP39 wordlist however, you would've made use of “addi” for https://bookmarkfame.com/story18663999/the-invalid-bip39-phrase-diaries