Bip39 numbers https://squareblogs.net/edelinepge/using-python-to-produce-a-bip39-mnemonic-a-developers-point-of-view Despite the fact that it employs BIP32 approach it is possible to however import BIP39 seeds into Electrum wallet. Also other than BIp32 There is certainly BIP44 Edition which some wallet use to the generation of seeds. For words that have only 3 letters, there isn't any https://nybookmark.com/story21996855/bip39-vs-the-smart-trick-of-bip39-word-list-github-that-no-one-is-discussing-https-linktr-ee-bip39