I took the index from the words, converted the number to binary, included three zeros, calculated the sha256 digest, took the very first Element of the hexadecimal to transform it to binary, extra a few zeros for the 8 digits on the binary and received 00000010011 which translates to 19 https://bookmarkshome.com/story4420469/considerations-to-know-about-bip39-word-list-pdf