I took the index of the words, transformed the selection to binary, additional 3 zeros, calculated the sha256 digest, took the 1st Component of the hexadecimal to transform it to binary, included three zeros towards the 8 digits with the binary and obtained 00000010011 which translates to 19 in decimal. https://ez-bookmarking.com/story19439875/little-known-facts-about-bip39-words