For words that have only three letters, there is absolutely no 4th letter. By way of example with the word “incorporate”, there aren't any a lot more letters Later on and therefore needs to be the word "include". The word “addict” is during the BIP39 wordlist however, you would have https://sitesrow.com/story8845983/the-5-second-trick-for-ledger-seed-phrase-bip39