Bip39 Tool. Now, at the next stage we use these getting and change key bunch to generate person private keys. Use the above generate personal keys and chain code and pass them to the above mentioned pointed out purpose kchild = kpar + hash(Kpar, cpar, i) to deliver unique keys. https://brightbookmarks.com/story19805123/bip39-words-https-linktr-ee-bip39-bip-39-no-further-a-mystery