Bip39 format https://list.ly/i/11078004 Checksum development: A checksum is produced from this entropy applying SHA-256 hashing, which allows validate the mnemonic's integrity afterwards. For words that only have three letters, there is not any 4th letter. By way of example Using the word “include”, there isn't any a lot more letters https://bookmarkcitizen.com/story20172221/bip39-passphrase-list-new-step-by-step-map-for-bip39-github-https-cutt-ly-uryc5rw7