Bip39 possible combinations https://500px.com/p/alexzhiglatyxrnxb Although it works by using BIP32 approach you'll be able to still import BIP39 seeds into Electrum wallet. Also other than BIp32 You can find BIP44 Variation which some wallet use for that technology of seeds. For words that only have three letters, there isn't a https://bookmarkja.com/story23333166/bip39-format-not-known-details-about-bip39-word-list-txt-https-cutt-ly-uryc5rw7