For words that have only 3 letters, there isn't any 4th letter. For instance with the word “add”, there isn't any a lot more letters afterwards and so need to be the word "insert". The word “addict” is while in the BIP39 wordlist however you would have utilized “addi” for https://bookmarkuse.com/story18859488/not-known-facts-about-bip39-english-words