I took the index of your words, converted the amount to binary, included three zeros, calculated the sha256 digest, took the 1st part of the hexadecimal to convert it to binary, extra a few zeros for the eight digits of the binary and obtained 00000010011 which translates to 19 in https://open.substack.com/pub/jaidenqrel955/p/unlocking-the-power-of-bip39-how?r=54uq0h&utm_campaign=post&utm_medium=web&showWelcomeOnShare=true