Bip39 specification https://www.sbnation.com/users/typhanhmdy Checksum development: A checksum is created from this entropy utilizing SHA-256 hashing, which assists verify the mnemonic's integrity later. For words that only have three letters, there's no 4th letter. For example Along with the word “incorporate”, there are no additional letters Later on and so needs https://bookmarkahref.com/story20470364/bip39-alternative-indicators-on-bip39-standard-you-should-know-https-x-com-tundra838554