I took the index from the words, converted the amount to binary, additional 3 zeros, calculated the sha256 digest, took the main A part of the hexadecimal to convert it to binary, extra 3 zeros to the 8 digits in the binary and obtained 00000010011 which translates to 19 in https://bookmarknap.com/story9153873/how-much-you-need-to-expect-you-ll-pay-for-a-good-bip39-definition