Bip39 github https://rentry.co/p68weyby Checksum development: A checksum is created from this entropy using SHA-256 hashing, which allows confirm the mnemonic's integrity afterwards. For words that only have three letters, there isn't a 4th letter. For example Using the word “incorporate”, there won't be any extra letters Later on and therefore https://sites2000.com/story9926241/dbs-unusual-addresses-not-known-details-about-bip39-generator-https-www-youtube-com-channel-ucupxfytj0fb78sq55hu6ocw