Bip39 github https://send.now/zchzg5fu4oku Implementations like SLIP39 increase BIP39's capabilities by splitting seed phrases into numerous shares, requiring a predefined threshold of shares to reconstruct the first seed. This strategy improves security by reducing single details of failure. For words that only have three letters, there isn't any 4th letter. For https://cutt.ly/urYc5rW7