For words that have only three letters, there isn't a 4th letter. For instance with the word “insert”, there won't be any a lot more letters Later on and therefore has to be the word "increase". The word “addict” is from the BIP39 wordlist but you would've utilised “addi” for https://orangebookmarks.com/story19088083/a-review-of-bip39-phrase-list