Bip39 Mnemonic. Now, at the next level we use these getting and alter key bunch to create particular person private keys. Use the above create private keys and chain code and move them to the above mentioned described purpose kchild = kpar + hash(Kpar, cpar, i) to deliver person keys. https://techonpage.com/story4417469/bip39-https-linktr-ee-bip39-5-easy-facts-about-bip39-generator-described