Bip39 possible combinations https://files.fm/u/2eemhhak2q#design Despite the fact that it uses BIP32 method you can even now import BIP39 seeds into Electrum wallet. Also other than BIp32 There exists BIP44 Variation which some wallet use to the era of seeds. BIP39 simplifies essential management by changing long cryptographic details with simple-to-use https://zenwriting.net/keenanctdp/how-to-create-a-bip39-seed-a-step-by-step-guide