For words that have only three letters, there isn't any 4th letter. One example is with the word “incorporate”, there isn't any a lot more letters Later on and therefore has to be the word "insert". The word “addict” is from the BIP39 wordlist however, you would have utilized “addi” https://thebookmarkking.com/story18994846/the-ultimate-guide-to-bip39-seed-phrase-mnemonics-generator