For words that have only three letters, there's no 4th letter. For example with the word “add”, there won't be any a lot more letters Later on and thus should be the word "increase". The word “addict” is inside the BIP39 wordlist but you would've utilized “addi” for “addict”. Artwork https://madbookmarks.com/story18796575/the-5-second-trick-for-ledger-seed-phrase-bip39