I took the index with the words, converted the quantity to binary, extra a few zeros, calculated the sha256 digest, took the initial Section of the hexadecimal to convert it to binary, included three zeros into the 8 digits with the binary and bought 00000010011 which interprets to 19 in https://telegra.ph/Unlocking-the-World-of-BIP39-A-Comprehensive-Guide-to-Mnemonic-Expressions-and-Word-Listings-01-17