For words that have only 3 letters, there's no 4th letter. For instance with the word “include”, there isn't any additional letters afterwards and therefore must be the word "increase". The word “addict” is while in the BIP39 wordlist however , you would have applied “addi” for “addict”. Should you https://bookmarksparkle.com/story18956243/little-known-facts-about-bip39-words