Bip39 Mnemonic. Now, at another level we use these acquiring and alter critical bunch to generate personal private keys. Use the above mentioned produce private keys and chain code and move them to the above mentioned pointed out purpose kchild = kpar + hash(Kpar, cpar, i) to deliver individual keys. https://companyspage.com/story4314474/bip39-wallet-https-linktr-ee-bip39-what-does-ian-coleman-bip39-mean