Bip39 Ian Coleman. All info these cookies accumulate is aggregated and as a consequence anonymous. If you do not make it possible for these cookies and scripts, we won't know when you have visited our site. For words that only have 3 letters, there isn't a 4th letter. One example https://24by7directory.com/listings13052698/bip39-seed-https-linktr-ee-bip39-5-simple-statements-about-bip39-compatible-wallet-explained