Bip39 meaning https://files.fm/u/2eemhhak2q#design Implementations like SLIP39 prolong BIP39's capabilities by splitting seed phrases into a number of shares, requiring a predefined threshold of shares to reconstruct the initial seed. This method boosts security by removing one factors of failure. For words that only have three letters, there isn't a 4th https://thekiwisocial.com/story5506128/bip39-test-vectors-bip39-compatible-wallet-can-be-fun-for-anyone-https-cutt-ly-uryc5rw7