Bip39-Standalone. Now, at the next stage we use these receiving and change key bunch to generate personal non-public keys. Use the above mentioned make private keys and chain code and go them to the above mentioned pointed out functionality kchild = kpar + hash(Kpar, cpar, i) to generate specific keys. https://bookmarkize.com/story18834778/bip39-wallets-https-linktr-ee-bip39-getting-my-bip39-passphrase-to-work