Bip39 add private key https://www.4shared.com/s/fAf7kF4dLku While it takes advantage of BIP32 strategy you may however import BIP39 seeds into Electrum wallet. Also besides BIp32 You can find BIP44 Variation which some wallet use for your generation of seeds. For words that only have three letters, there isn't any 4th letter. https://geniusbookmarks.com/story20459560/bip39-c-not-known-factual-statements-about-bip39-word-list-txt-https-dzen-ru-bip39-phrase-com