I took the index in the words, converted the amount to binary, additional three zeros, calculated the sha256 digest, took the very first Component of the hexadecimal to transform it to binary, extra a few zeros towards the 8 digits of your binary and bought 00000010011 which translates to 19 https://open.substack.com/pub/jaidenqrel955/p/unlocking-the-power-of-bip39-how?r=54uq0h&utm_campaign=post&utm_medium=web&showWelcomeOnShare=true