For words that have only three letters, there isn't a 4th letter. Such as with the word “increase”, there won't be any extra letters Later on and therefore have to be the word "incorporate". The word “addict” is while in the BIP39 wordlist however you might have used “addi” for https://bookmark-vip.com/story19017136/a-secret-weapon-for-bip39-words-to-numbers