Enter your bip39 mnemonic https://www.anobii.com/en/01000289012ff9b293/profile/activity Although it makes use of BIP32 system you'll be able to even now import BIP39 seeds into Electrum wallet. Also other than BIp32 There's BIP44 version which some wallet use with the era of seeds. For words that only have 3 letters, there's no 4th https://list.ly/abregeouoh