For words that only have 3 letters, there isn't a 4th letter. As an example with the word “include”, there are no additional letters afterwards and therefore should be the word "insert". The word “addict” is inside the BIP39 wordlist however , you would have applied “addi” for “addict”. Unlock https://tvsocialnews.com/story4304658/facts-about-bip39-seed-phrase-word-list-revealed