Bip39 blockchain https://500px.com/p/alexzhiglatyxrnxb Checksum development: A checksum is produced from this entropy using SHA-256 hashing, which assists verify the mnemonic's integrity later on. For words that have only 3 letters, there is absolutely no 4th letter. For example with the word “include”, there are no a lot more letters Later https://artybookmarks.com/story19698673/bip39-generator-online-the-5-second-trick-for-bip39-compatible-wallet-https-dzen-ru-bip39-phrase-com