For words that only have three letters, there isn't a 4th letter. As an example with the word “include”, there isn't any far more letters Later on and therefore needs to be the word "include". The word “addict” is inside the BIP39 wordlist but you would have used “addi” for https://telebookmarks.com/story9140249/little-known-facts-about-bip39-seed-phrase-list