Bip39 possible combinations https://telegra.ph/Producing-Custom-Bitcoin-Addresses-A-Take-A-Look-At-BIP39-Strategies-06-28 Even though it utilizes BIP32 strategy you could still import BIP39 seeds into Electrum wallet. Also aside from BIp32 there is BIP44 version which some wallet use for the technology of seeds. It's straightforward — if you do not worry about copyright inheritance, n... https://optimusbookmarks.com/story20123348/bip39-mnemonic-online-bip39-github-an-overview-https-dzen-ru-bip39-phrase-com