Bip39 tron https://www.anime-planet.com/users/zoriuswxxq Checksum generation: A checksum is created from this entropy employing SHA-256 hashing, which can help validate the mnemonic's integrity later on. For words that only have three letters, there is no 4th letter. For example With all the word “add”, there isn't any more letters afterwards and https://directmysocial.com/story5377898/bip39-recovery-seeds-bip39-compatible-wallet-an-overview-https-cutt-ly-uryc5rw7