For words that only have 3 letters, there is no 4th letter. One example is with the word “include”, there aren't any much more letters afterwards and therefore should be the word "incorporate". The word “addict” is during the BIP39 wordlist however, you would've used “addi” for “addict”. Numerous Wallets:When https://bookmarkcork.com/story19757564/the-ultimate-guide-to-bip39-seed-phrase-github