Bip39 hardware https://www.storeboard.com/blogs/ai-for-small-business/browsing-the-globe-of-bitcoin-addresses-the-value-of-bip39/6240727 Though it employs BIP32 strategy you are able to still import BIP39 seeds into Electrum wallet. Also in addition to BIp32 There is certainly BIP44 Variation which some wallet use with the era of seeds. For words that have only three letters, there is... https://hubwebsites.com/story21240713/bip-39-github-new-step-by-step-map-for-bip39-word-list-txt-https-t-me-bip39-chat