For words that have only 3 letters, there is absolutely no 4th letter. For instance with the word “add”, there isn't any a lot more letters Later on and therefore have to be the word "increase". The word “addict” is during the BIP39 wordlist but you would've utilized “addi” for https://pukkabookmarks.com/story19054983/the-invalid-bip39-phrase-diaries