For words that only have 3 letters, there isn't any 4th letter. For example with the word “insert”, there won't be any far more letters Later on and therefore must be the word "increase". The word “addict” is inside the BIP39 wordlist but you might have utilized “addi” for “addict”. https://pageoftoday.com/story4229296/top-latest-five-bip39-words-urban-news