For words that only have three letters, there isn't any 4th letter. One example is with the word “include”, there isn't any extra letters afterwards and so has to be the word "include". The word “addict” is inside the BIP39 wordlist however you might have employed “addi” for “addict”. Discovering https://bookmarkick.com/story19181287/how-much-you-need-to-expect-you-ll-pay-for-a-good-valid-bip39-seed-phrase