For words that only have 3 letters, there isn't any 4th letter. For example with the word “insert”, there won't be any a lot more letters Later on and thus needs to be the word "incorporate". The word “addict” is inside the BIP39 wordlist but you would've employed “addi” for https://bookmarksoflife.com/story4377697/fascination-about-bip39-english-words