Bip39 english word list https://500px.com/p/alexzhiglatyxrnxb While it takes advantage of BIP32 approach you can still import BIP39 seeds into Electrum wallet. Also besides BIp32 There's BIP44 Model which some wallet use for that generation of seeds. For words that only have three letters, there is not any 4th letter. Such https://socialislife.com/story5566395/bip39-compatible-wallet-bip39-compatible-wallet-options-https-x-com-tundra838554