For words that only have 3 letters, there is no 4th letter. One example is with the word “incorporate”, there aren't any a lot more letters Later on and therefore should be the word "add". The word “addict” is during the BIP39 wordlist however, you might have employed “addi” for https://bookmarksden.com/story19187066/getting-my-bip39-words-to-numbers-to-work