Bitcoin bip39 generator https://unsplash.com/@morganvmyg Although it takes advantage of BIP32 approach it is possible to however import BIP39 seeds into Electrum wallet. Also other than BIp32 there is BIP44 version which some wallet use for the era of seeds. For words that only have 3 letters, there's no 4th letter. https://pageoftoday.com/story5813711/bip39-wordlist-bip39-npm-no-further-a-mystery-https-t-me-bip39-chat