Bip39 Seed Phrase. Now, at the next level we use these getting and alter critical bunch to generate specific non-public keys. Use the above mentioned make non-public keys and chain code and go them to the above described purpose kchild = kpar + hash(Kpar, cpar, i) to create individual keys. https://socialrator.com/story9897232/bip39-wallets-https-linktr-ee-bip39-getting-my-bip39-wallets-to-work