For words that have only 3 letters, there is not any 4th letter. One example is with the word “incorporate”, there won't be any far more letters Later on and so have to be the word "insert". The word “addict” is while in the BIP39 wordlist however , you would https://ok-social.com/story4271085/new-step-by-step-map-for-ledger-seed-phrase-bip39