I took the index with the words, converted the variety to binary, included three zeros, calculated the sha256 digest, took the main part of the hexadecimal to transform it to binary, additional three zeros to the 8 digits of the binary and received 00000010011 which translates to 19 in decimal. https://privatebin.net/?57c491b9cad17a10#2jP1wyi3VUgs8q9BTwvowdFnmCxc6BsRV7dxomBiXrt6