Bip39 cuda https://gravatar.com/sparklyusually6089a4f337 Although it employs BIP32 strategy you'll be able to even now import BIP39 seeds into Electrum wallet. Also other than BIp32 There is certainly BIP44 Edition which some wallet use with the era of seeds. For words that only have three letters, there is no 4th letter. https://www.storeboard.com/blogs/ai-for-small-business/browsing-the-globe-of-bitcoin-addresses-the-value-of-bip39/6240727