Bip39 to bip32 https://www.plurk.com/p/3hf2syltjx Checksum creation: A checksum is created from this entropy working with SHA-256 hashing, which can help verify the mnemonic's integrity later. For words that only have 3 letters, there isn't a 4th letter. As an example With all the word “incorporate”, there isn't any extra letters https://wearethelist.com/story21903759/bip39-entropy-not-known-details-about-bip39-generator-https-t-me-bip39-chat