Bip39 combinations https://zenwriting.net/keenanctdp/how-to-create-a-bip39-seed-a-step-by-step-guide Although it works by using BIP32 system you may however import BIP39 seeds into Electrum wallet. Also apart from BIp32 There is certainly BIP44 Edition which some wallet use to the era of seeds. Want to check which wallets assist the BIP39 mnemonic recovery seed phrase? Read https://bookmarkbooth.com/story20630005/bip39-word-list-indicators-on-bip39-standard-you-should-know-https-linktr-ee-bip39