Bip39 protocol https://www.empowher.com/user/4550298 Despite the fact that it uses BIP32 strategy you are able to nevertheless import BIP39 seeds into Electrum wallet. Also in addition to BIp32 There's BIP44 Model which some wallet use for that era of seeds. For words that only have three letters, there is absolutely no https://collinmmss433.lucialpiazzale.com/from-concept-to-fact-generating-bitcoin-addresses-with-bip39