I took the index from the words, transformed the amount to binary, additional 3 zeros, calculated the sha256 digest, took the initial Section of the hexadecimal to convert it to binary, added a few zeros into the eight digits of your binary and received 00000010011 which translates to 19 in https://social-lyft.com/story8690901/how-much-you-need-to-expect-you-ll-pay-for-a-good-bip39-definition