For words that only have three letters, there's no 4th letter. For instance with the word “increase”, there aren't any much more letters Later on and therefore have to be the word "insert". The word “addict” is during the BIP39 wordlist however , you would've applied “addi” for “addict”. You https://www.animenewsnetwork.com/bbs/phpBB2/profile.php?mode=viewprofile&u=1025088