Bip39 regex https://franciscougju442.bravesites.com/entries/general/Produce-Bitcoin-Addresses-from-Seed-Every-Little-Thing-You-Required-to-Know Though it takes advantage of BIP32 method you could even now import BIP39 seeds into Electrum wallet. Also other than BIp32 There's BIP44 Model which some wallet use for that era of seeds. BIP32 and BIP44 work together to add overall flexibili... https://madesocials.com/story6023569/bip39-passphrase-solana-helping-the-others-realize-the-advantages-of-bip39-passphrase-https-cutt-ly-uryc5rw7