For words that have only 3 letters, there's no 4th letter. As an example with the word “incorporate”, there aren't any a lot more letters afterwards and therefore has to be the word "insert". The word “addict” is while in the BIP39 wordlist however , you would've used “addi” for https://socialmediastore.net/story19676380/the-ultimate-guide-to-bip39-seed-phrase-mnemonics-generator