I took the index on the words, converted the number to binary, extra 3 zeros, calculated the sha256 digest, took the 1st Element of the hexadecimal to transform it to binary, included a few zeros into the eight digits with the binary and obtained 00000010011 which interprets to 19 in https://bookmarking1.com/story18798885/how-much-you-need-to-expect-you-ll-pay-for-a-good-bip39-definition