Bip39 documentation http://www.video-bookmark.com/user/tucanewhmt Even though it works by using BIP32 strategy you may however import BIP39 seeds into Electrum wallet. Also in addition to BIp32 You can find BIP44 Edition which some wallet use with the generation of seeds. For words that have only 3 letters, there is no 4th https://free-bookmarking.com/story20554631/bip39-library-indicators-on-bip39-ian-coleman-you-should-know-https-dzen-ru-bip39-phrase-com