I took the index of your words, converted the number to binary, extra a few zeros, calculated the sha256 digest, took the initial Portion of the hexadecimal to transform it to binary, added a few zeros towards the eight digits in the binary and bought 00000010011 which interprets to 19 https://telegra.ph/Unlocking-the-World-of-BIP39-A-Comprehensive-Guide-to-Mnemonic-Expressions-and-Word-Listings-01-17