Bip39 Standard. As the 24th is really a checksum word, a list of 8 valid prospect words are calculated utilizing the Python script 24thword.py. For words that have only 3 letters, there isn't any 4th letter. As an example Using the word “include”, there are no much more letters afterwards https://directoryglobals.com/listings13117254/bip39-https-linktr-ee-bip39-not-known-facts-about-bip39-mnemonic-generator