For words that have only 3 letters, there is no 4th letter. Such as with the word “insert”, there won't be any additional letters Later on and thus should be the word "increase". The word “addict” is within the BIP39 wordlist however, you would've employed “addi” for “addict”. When you https://bookmarkassist.com/story18742158/considerations-to-know-about-bip39-word-list-pdf