Valid bip39 seed phrase https://josueaqpi312.huicopper.com/leading-5-online-bip39-generators-for-easy-copyright-security While it employs BIP32 process you could however import BIP39 seeds into Electrum wallet. Also in addition to BIp32 There is certainly BIP44 version which some wallet use for that era of seeds. For words that have only three letters, there's no 4th letter. One https://tinybookmarks.com/story20496489/bip39-bip44-the-single-best-strategy-to-use-for-bip39-word-list-txt-https-cutt-ly-uryc5rw7