For words that have only 3 letters, there is no 4th letter. One example is with the word “include”, there are no a lot more letters Later on and so need to be the word "incorporate". The word “addict” is during the BIP39 wordlist however , you might have utilized https://iowa-bookmarks.com/story15401521/detailed-notes-on-copyright-wallet-seed-phrase-out-of-bip39