For words that have only 3 letters, there's no 4th letter. By way of example with the word “incorporate”, there are no far more letters Later on and thus has to be the word "insert". The word “addict” is while in the BIP39 wordlist however you would have made use https://bookmarkmiracle.com/story20563266/how-much-you-need-to-expect-you-ll-pay-for-a-good-valid-bip39-seed-phrase