Bip39 documentation https://devinzryy552.trexgame.net/comprehending-bip32-vs-bip39-which-one-should-you-make-use-of The last step of BIP-39 is producing the actual binary seed and that is then utilised for a master important in BIP-32 deterministic wallet or applying other approaches. For words that have only 3 letters, there isn't a 4th letter. For example with the word “insert”, there https://socialbookmarkgs.com/story20625761/bip39-length-the-single-best-strategy-to-use-for-bip39-generator-https-www-youtube-com-channel-ucupxfytj0fb78sq55hu6ocw