I took the index in the words, transformed the quantity to binary, additional three zeros, calculated the sha256 digest, took the 1st Component of the hexadecimal to transform it to binary, included three zeros towards the eight digits on the binary and acquired 00000010011 which translates to 19 in decimal. https://bookmarkstime.com/story20173100/getting-my-bip39-words-to-numbers-to-work