Bip39 Passphrase. Since the 24th is a checksum word, a list of eight legitimate candidate words are calculated using the Python script 24thword.py. For words that only have 3 letters, there isn't any 4th letter. One example is Together with the word “add”, there are no far more letters Later https://begindirectory.com/listings13081490/bip39-ian-coleman-https-linktr-ee-bip39-not-known-facts-about-bip39-mnemonic-generator