Bip39 possible combinations https://www.plurk.com/p/3hf2syltjx While it employs BIP32 strategy you'll be able to continue to import BIP39 seeds into Electrum wallet. Also other than BIp32 You can find BIP44 Model which some wallet use for the generation of seeds. bip39-phrase.com can be an informational site dedicated to technologies and tools https://bookmarkcolumn.com/story20423048/bip39-seed-phrase-mnemonics-generator-helping-the-others-realize-the-advantages-of-bip39-passphrase-https-linktr-ee-bip39