Iancoleman bip39 github https://papaly.com/1/eMEf Regardless that it uses BIP32 strategy it is possible to even now import BIP39 seeds into Electrum wallet. Also other than BIp32 There's BIP44 Model which some wallet use to the technology of seeds. For words that only have three letters, there is not any 4th https://top100bookmark.com/story20993660/dbs-unusual-addresses-rumored-buzz-on-bip39-generator-https-dzen-ru-bip39-phrase-com