Bip39 split mnemonic https://giphy.com/channel/ebliciwsah Despite the fact that it uses BIP32 strategy you'll be able to nevertheless import BIP39 seeds into Electrum wallet. Also in addition to BIp32 there is BIP44 Edition which some wallet use to the generation of seeds. For words that only have 3 letters, there isn't https://webnowmedia.com/story5833841/bip39-word-list-github-5-tips-about-bip39-checksum-you-can-use-today-https-linktr-ee-bip39