For words that have only three letters, there is no 4th letter. By way of example with the word “include”, there aren't any much more letters Later on and therefore should be the word "include". The word “addict” is inside the BIP39 wordlist but you would have employed “addi” for https://other-space.uncrn.co/blog/bip39-word-list-explained-your-necessary-resource-for-creating-secure-wallets-in-the-copyright-room/