For words that have only three letters, there isn't a 4th letter. Such as with the word “insert”, there aren't any far more letters afterwards and therefore must be the word "insert". The word “addict” is inside the BIP39 wordlist however, you would've made use of “addi” for “addict”. Keep https://seobookmarkpro.com/story18971980/5-essential-elements-for-bip39-explained