I took the index from the words, transformed the number to binary, additional three zeros, calculated the sha256 digest, took the 1st Component of the hexadecimal to convert it to binary, added three zeros into the 8 digits with the binary and bought 00000010011 which interprets to 19 in decimal. https://writeablog.net/ipennywpzc/h1-b-opening-the-power-of-bip39-exactly-how-to-produce-and-use-mnemonic