For words that have only 3 letters, there is no 4th letter. One example is with the word “increase”, there isn't any extra letters Later on and therefore should be the word "add". The word “addict” is in the BIP39 wordlist however, you would have utilised “addi” for “addict”. gravity https://yxzbookmarks.com/story18787222/how-much-you-need-to-expect-you-ll-pay-for-a-good-valid-bip39-seed-phrase