For words that have only three letters, there isn't a 4th letter. For example with the word “incorporate”, there isn't any extra letters afterwards and thus should be the word "add". The word “addict” is during the BIP39 wordlist however, you would've applied “addi” for “addict”. You could have a https://socialaffluent.com/story4276149/new-step-by-step-map-for-ledger-seed-phrase-bip39