For words that have only three letters, there is no 4th letter. By way of example with the word “increase”, there won't be any a lot more letters Later on and therefore should be the word "insert". The word “addict” is inside the BIP39 wordlist however , you would have https://onlybookmarkings.com/story18882711/helping-the-others-realize-the-advantages-of-bip39-seed-phrase-mnemonics-generator