For words that have only 3 letters, there isn't a 4th letter. One example is with the word “incorporate”, there won't be any a lot more letters afterwards and so must be the word "increase". The word “addict” is while in the BIP39 wordlist however, you would've applied “addi” for https://bookmarkworm.com/story18791275/the-5-second-trick-for-ledger-seed-phrase-bip39