For words that have only 3 letters, there's no 4th letter. By way of example with the word “insert”, there aren't any extra letters afterwards and therefore has to be the word "add". The word “addict” is while in the BIP39 wordlist but you would've employed “addi” for “addict”. gravity https://wiishlist.com/story19391052/new-step-by-step-map-for-ledger-seed-phrase-bip39