Bip39 tangem https://www.storeboard.com/blogs/ai-for-small-business/browsing-the-globe-of-bitcoin-addresses-the-value-of-bip39/6240727 While it uses BIP32 technique you could nevertheless import BIP39 seeds into Electrum wallet. Also other than BIp32 there is BIP44 Variation which some wallet use for that technology of seeds. For words that have only 3 letters, there isn't a 4th lette... https://socialioapp.com/story5309818/trezor-one-bip39-5-essential-elements-for-bip39-word-list-pdf-https-x-com-tundra838554