Bip39 Ian Coleman. As the 24th is often a checksum word, a list of eight legitimate applicant words are calculated using the Python script 24thword.py. For words that only have three letters, there isn't any 4th letter. Such as Along with the word “incorporate”, there won't be any more letters https://directoryvenom.com/listings13093826/bip39-checksum-https-linktr-ee-bip39-details-fiction-and-bip39-word-list-pdf