I took the index with the words, transformed the variety to binary, additional 3 zeros, calculated the sha256 digest, took the main Element of the hexadecimal to transform it to binary, included 3 zeros on the eight digits of your binary and got 00000010011 which translates to 19 in decimal. https://privatebin.net/?57c491b9cad17a10#2jP1wyi3VUgs8q9BTwvowdFnmCxc6BsRV7dxomBiXrt6